LATIN DICTIONARYLexicon Latīnum
verbthird (-iō variant) conjugation, highly defective, no passive, no supine stem, no gerund

aiō

aiō (present infinitive aiere, perfect active ait)
Classical[ˈaj.joː]Ecclesiastical[ˈaː.jo]
№ 406 of the 1,000 commonest wordsMille Verba core vocabulary

Meaning

  1. to say, speak, assert, say “yes”, affirm (also in reply)
    Cōnfūcius aiēbat...Confucius said...Stanislaus Julien translating Mencius as Meng Tseu, p. 46
    ‘Quid mē lūdis?’, ait, ‘Quis tē, male sāne, iubēbat...?“Are you making fun of me?“, she says, “Are you stupid? Who asked you to...?“16 BCE, Ovidius, Amores 3.7.77
  2. to say, argue

Latīnē defined in Latin in our graded readers

dīcō; ut ait poēta = ut poēta dīcit.
āiō ais ait — in Mille Verba, Schola

Choosing the right word Döderlein's Latin Synonyms

Dicere · Aio · Inquam · Asseverare · Affirmare · Contendere · Fari · Fabulari

1. Dicere denotes to say, as conveying information, in reference to the hearer, in opp. to tacere, like the neutral word loqui. Cic. Rull. ii. 1. Ver. ii. 1, 71, 86. Plin. Ep. iv. 20. vii. 6, like λέγειν; but aio expresses an affirmation, with reference to the speaker, in opp. to nego. Cic. Off. iii. 23. Plaut. Rud. ii. 4, 14. Terent. Eun. ii. 2, 21, like φάναι. 2. Ait is in construction with an indirect form of speech, and therefore generally governs an infinitive; whereas inquit is in construction with a direct form of speech, and therefore admits an indicative, imperative, or conjunctive. 3. Aio denotes the simple affirmation of a proposition by merely expressing it, whereas asseverare, affirmare, contendere, denote an emphatic affirmation; asseverare is to affirm in earnest, in opp. to a jocular, or even light affirmation, jocari. Cic. Brut. 85; affirmare, to affirm as certain, in opp. to doubts and rumors, dubitare, Divin. ii. 3, 8; contendere, to affirm against contradiction, and to maintain one’s opinion, in opp. to yielding it up, or renouncing it. 4. Dicere (δεῖξαι) denotes to say, without any accessory notion, whereas loqui (λακεῖν), as a transitive verb, with the contemptuous accessory notion that that which is said is mere idle talk. Cic. Att. xiv. 4. Horribile est quæ loquantur, quæ minitentur. 5. Loqui denotes speaking in general; fabulari, a good-humored, or, at least, pleasant mode of speaking, to pass away the time, in which no heed is taken of the substance and import of what is said, like λαλεῖν; lastly, dicere, as a neuter verb, denotes a speech prepared according to the rules of art, a studied speech, particularly from the rostrum, like λέγειν. Liv. xlv. 39. Tu, centurio, miles, quid de imperatore Paulo senatus decreverit potius quam quid Sergio Galba fabuletur audi, et hoc dicere me potius quam illum audi; ille nihil præterquam loqui, et id ipsum maledice et maligne didicit. Cic. Brut. 58. Scipio sane mihi bene et loqui videtur et dicere. Orat. iii. 10. Neque enim conamur docere eum dicere qui loqui nesciat. Orat. 32. Muren. 34, 71. Suet. Cl. 4. Qui tam ἀσαφῶς loquatur, qui possit quum declamat σαφῶς dicere quæ dicenda sunt non video. 6. Fari (φάναι) denotes speaking, as the mechanical use of the organs of speech to articulate sounds and words, nearly in opp. to infantem esse; whereas loqui (λακεῖν), as the means of giving utterance to one’s thoughts, in opp. to tacere. And as fari may be sometimes limited to the utterance of single words, it easily combines with the image of an unusual, imposing, oracular brevity, as in the decrees of fate, fati; whereas loqui, as a usual mode of speaking, is applicable to excess in speaking, loquacitas. (iv. 1.)

Conjugation

active indicative
formpresentimperfectfutureperfectpluperfectfut. perfect
1st sg.aiōaiēbam————
2nd sg.aisaiēbās—aistī——
3rd sg.aitaiēbat—ait——
1st pl.—aiēbāmus————
2nd pl.aitisaiēbātis————
3rd pl.aiuntaiēbant—aiērunt
aiēre
——
active subjunctive
active subjunctive
formpresentimperfectperfectpluperfect
1st sg.aiam———
2nd sg.aiās———
3rd sg.aiataieret——
1st pl.————
2nd pl.————
3rd pl.aiant———
imperative
imperative
formactivepassive
pres. 2nd sg.ai—
infinitives & participles
infinitives & participles
formactivepassive
present infinitiveaiere—
present participleaiēns
aiente, aientem, aientēs, aientī, aientia, aientibus, aientis, aientīs, aientium
—

Phrases from Meissner's Latin Phrase-Book

ut ait Homerus
as Homer sings (not canit).
ut ait Cicero (always in this order)
as Cicero says.
ut or quod or quomodo aiunt, ut or quemadmodum dicitur
as the proverb says.
adversante et repugnante natura or invitā Minervā (ut aiunt) aliquid facere (Off. 1. 31. 110)
to do a thing which is not one's vocation, which goes against the grain.

āio,
I. verb. defect. The forms in use are: pres. indic. āio, ăis, ait—aiunt; subj. aias, aiat—aiant; imperf. indic. throughout, aiebam, aiebas, etc.; imper. ai, rare; part. pres. aiens, rare; once in App. M. 6, p. 178 Elm.; and once as P. a. in Cic. Top. 11, 49, v. below. Cic. wrote the pres. aiio, acc. to Quint. 1, 4, 11.—From ais with the interrog. part. ne, ain is used in colloquial language. For imperf. also aibas, Plaut. Trin. 2, 4, 28; Ter. Ad. 4, 2, 22: aibat, Plaut. Trin. 4, 2, 33; 5, 2, 16: aibant, id. ib. 1, 2, 175; 4, 2, 102; Ter. And. 3, 3, 3; ai is dissyl., but in the imper. also monosyl., Plaut. Truc. 5, 49; cf. Bentl. ad Ter. Ad. 4, 6, 5. Acc. to Prisc. 818 P., the pres. ait seems to take the place of a perf., but acc. to Val. Prob. 1482 P., there was a real perf. ai, aisti, ait; as aisti, Aug. Ep. 54 and 174: aierunt, Tert. Fuga in Persec. 6; the pres. inf. aiere is found in Aug. Trin. 9, 10 [cf. ἠμί = I say; Sanscr. perf. 3d sing. āha = he spake; adagium, adagio; negare for neigare; Umbr. aitu = dicito; Engl. aye = yea, yes, and Germ. ja], to say yes, to assent (opp. nego, to say no; with the ending -tumo, aiutumo; contract. autumo; opp. negumo; v. autumo).
I. In gen.: vel ai vel nega, Naev. ap. Prisc. 473 P.: veltu mihi aias vel neges, Plaut. Rud. 2, 4, 14: negat quis? nego. Ait? aio, Ter. Eun. 2, 2, 21: Diogenes ait, Antipater negat, Cic. Off. 3, 23: quasi ego id curem, quid ille aiat aut neget, id. Fin. 2, 22; so id. Rab. Post. 12, 34.—
II. Esp.
A. To say, affirm, or assert something (while dicere signifies to speak in order to inform, and affirmare, to speak in affirmation, Doed. Syn. 4, 6 sq.—Therefore different from inquam, I say, I reply, since aio is commonly used in indirect, and inquam in direct discourse; cf. Doed. as cited above; Herz. ad Sall. C. 48, 3; and Ramsh. Gr. 800).
a. In indirect discourse: insanam autem illam (sc. esse) aiunt, quia, etc., Pac. ap. Cic. Her. 2, 23, 36; Plaut. Capt. 1, 1, 3: Ch. Hodie uxorem ducis? Pa. Aiunt, they say so, id. ib. 2, 1, 21: ait hac laetitiā Deiotarum elatum vino se obruisse, Cic. Deiot. 9: debere eum aiebat, etc., Cic. Verr. 2, 1, 18: Tarquinium a Cicerone immissum aiebant, Sall. C. 48, 8: Vos sapere et solos aio bene vivere, Hor. Ep. 1, 15, 45; id. S. 1, 2, 121; id. Ep. 1, 1, 88; 1, 7, 22.—
b. In direct discourse: Ennio delector, ait quispiam, quod non discedit a communi more verborum; Pacuvio, inquit alius, Cic. Or. 11, 36: Vos o, quibus integer aevi Sanguis, ait, solidaeque, etc., Verg. A. 2, 639; 6, 630; 7, 121; 12, 156: O fortunati mercatores! gravis annis Miles ait, Hor. S. 1, 1, 4; id. Ep. 1, 15, 40; 1, 16, 47; id. S. 2, 7, 72; 1, 3, 22.—
c. With acc.: Causa optumast, Nisi quid pater ait aliud, Ter. And. 5, 4, 47: Admirans ait haec, Cat. 5, 3, 4; 63, 84: Haec ait, Verg. A. 1, 297; v. B.—
B. Simply to speak, and esp. in the form of transition, sic ait, thus he speaks or says (cf. the Hom. ὣς φάτο): Sic ait, et dicto citius tumida aequora placat, Verg. A. 1, 142; 5, 365; 9, 749.— Also of what follows: Sic ait in molli fixa toro cubitum: Tandem, etc., Prop. 1, 3, 34.—
C. Ut ait quispiam (regularly in this order in Cic.), in quoting an unusual expression, as one says: ut ait Statius noster in Synephebis, Cic. Sen. 7: ut ait Homerus, id. ib. 10: ut ait Theophrastus, id. Tusc. 1, 19, 45: ut ait Thucydides, Nep. Them. 2: ut ait Cicero, Quint. 7, 1, 51; 8, 6, 73; 9, 4, 40; 9, 56, 60: ut Cicero ait, id. 10, 7, 14; 12, 3, 11: ut Demosthenes ait, id. 11, 1, 22: ut rumor ait, Prop. 5, 4, 47: uti mos vester ait, Hor S. 2, 7, 79.—So without def. subject: ut ait in Synephebis, Cic. Tusc. 1, 14, 31.—
D. Aiunt, ut aiunt, quemadmodum or quod aiunt, in quoting a proverbial or technical phrase, as they say, as is said, as the saying is (Gr. τὸ λεγόμενον, ὡς φασί; Fr. on dit; Germ. man sagt), either placed after it or interposed: eum rem fidemque perdere aiunt, Plaut. Curc. 4, 2, 18: ut quimus, aiunt; quando, ut volumus, non licet, Ter. And. 4, 5, 10: docebo sus, ut aiunt, oratorem eum, Cic. de Or. 2, 57: Iste claudus, quemadmodum aiunt, pilam, id. Pis. 28 B. and K. —Also in telling an anecdote: conspexit, ut aiunt, Adrasum quendam vacuā tonsoris in umbrā, Hor. Ep. 1, 7, 49; 1, 17, 18.—
E. In judic. lang.: ait lex, ait praetor, etc., the law, the prœtor says, i. e. prescribes, commands: ut ait lex Julia, Dig. 24, 3, 64: Praetor ait, in eadem causā eum exhibere, etc., ib. 2, 9, 1: Aiunt aediles, qui mancipia vendunt, etc., ib. 21, 1, 1: Ait oratio, fas esse eum, etc., ib. 24, 1, 32 al.—
F. Ain? = aisne? also often strengthened: ain tu? ain tute? ain tandem? ain vero? in conversational lang., a form of interrogation which includes the idea of surprise or wonder, sometimes also of reproof or sorrow, do you really mean so? indeed? really? is it possible? often only an emphatic what? Plaut. Ep. 3, 4, 73: Merc. Servus esne an liber? Sos. Utcumque animo conlibitumst meo. Merc. Ain vero? Sos. Aio enim vero, id. ib. 3, 4, 188; id. Am. 1, 1, 128: Phil. Pater, inquam, aderit jam hic meus. Call. Ain tu, pater? id. Most. 2, 1, 36; id. Ep. 5, 2, 33; id. Aul. 2, 2, 9; id. Curc. 2, 3, 44; Ter. Hec. 3, 4, 1; id. Eun. 3, 5, 19 al: Ain tu? Scipio hic Metellus proavum suum nescit censorem non fuisse? Cic. Att. 6, 1; 4, 5 al.: ain tute, Plaut. Truc. 1, 2, 90: ain tandem ita esse, ut dicis? id. Aul. 2, 4, 19; so id. As. 5, 2, 47; id. Trin. 4, 2, 145; Ter. And. 5, 3, 4: ain tandem? insanire tibi videris, quod, etc., Cic. Fam. 9, 21 Manut.; id. Att. 6, 2.—Also with a plur. verb (cf. age with plur. verb, s. v. ago, IV. a.): ain tandem? inquit, num castra vallata non habetis? Liv. 10, 25.—
G. Quid ais? (as in conversation).—
a. With the idea of surprise, astonishment, Τί λέγεις (cf. Quid dixisti? Ter. And. 3, 4, 14; id. Eun. 5, 6, 16, Τί εἶπας); what do you say? what? Merc. Quis herus est igitur tibi? Sos. Amphitruo, quicum nuptast Alcumena. Merc. Quid ais? Quid nomen tibist? Plaut. Am. 1, 1, 208; so Ter. And. 4, 1, 42; id. Heaut. 5, 1, 27.—
b. When one asks another for his meaning, opinion, or judgment, what do you mean? what do you say or think? Th. Ita me di ament, honestust. Pa. Quid tu ais, Gnatho? Num quid habes, quod contemnas? Quid tu autem, Thraso? Ter. Eun. 3, 2, 21: Hunc ais? Do you mean this man? (= dicis, q. v., II.) Pers. 4, 27.—
c. When one wishes to try or prove another, what is your opinion? what do you say? Sed quid ais? quid Amphitruoni [dono] a Telebois datumst? Plaut. Am. 1, 1, 262.—Hence, * āiens, entis, P. a., affirming, affirmative (usu. affirmativus): negantia contraria aientibus, Cic. Top. 11, 49.

Origins

  1. Proto-Indo-European*h₁eǵ-
  2. Proto-Indo-European*h₁ǵyéti
  3. Proto-Italic*agjō
  4. Proto-Italic*ajjō
  5. Latinaiō

From Proto-Italic *ajjō, from Proto-Indo-European *h₁ǵyéti, from Proto-Indo-European *h₁eǵ- (“to say”). Cognate with adā̆gium, prōdigium, Ancient Greek ἠμί (ēmí, “to say”), Old Armenian ասեմ (asem, “to say”), and Proto-Tocharian *āks- (“to announce, proclaim, instruct”).

Quick answers

What does aiō mean in Latin?
aiō, a verb, means “to say, speak, assert, say “yes”, affirm (also in reply); to say, argue”.
What are the principal parts of aiō?
aiō, aiere (third (-iō variant) conjugation, highly defective, no passive, no supine stem, no gerund).
How do you pronounce aiō?
In classical Latin, [ˈaj.joː]; in ecclesiastical (church) Latin, [ˈaː.jo].
Where does aiō come from?
Proto-Indo-European *h₁eǵ- → Proto-Indo-European *h₁ǵyéti → Proto-Italic *agjō → Proto-Italic *ajjō → Latin aiō.