LATIN DICTIONARYLexicon Latīnum
verbthird (-iō variant) conjugation

iaciō

iaciō (present infinitive iacere, perfect active iēcī, supine iactum)
Classical[ˈja.ki.oː]Ecclesiastical[ˈjaː.t͡ʃi.o]
№ 899 of the 1,000 commonest wordsMille Verba core vocabulary

Meaning

  1. to throw, hurl, cast, fling; throw away
    Alea iacta est.The die has been cast.
  2. to lay, set, establish, build, found, construct, erect
    fundamenta iacereto lay the foundations/groundwork
  3. to send forth, emit; bring forth, produce
  4. to scatter, sow, throw
  5. to project
  6. figurativelyto throw out in speaking, let fall, utter, mention, declare

Latīnē defined in Latin in our graded readers

manū mittō; pīla in hostēs iaciuntur.
iaciō -ere — in Mille Verba, Bellum et Arma

Choosing the right word Döderlein's Latin Synonyms

Amittere · Perdere · Jactura

1. Amittere means to lose something, so that it ceases to be in our possession, like ἀποβαλεῖν, opp. to retinere, Cic. Rep. v. i. Sext. 47. Suet. Tib. 15. Ter. Phorm. iii. 2, 22; perdere means, to lose something, so that it is destroyed, and rendered useless, like διολέσαι, opp. to servare. Plaut. Rud. iv. 4, 120. Ter. Ad. ii. 2, 32. Sen. Contr. iii. 21.—Tac. Ann. ii. 25. Perdita classe, amissis armis. 2. Amissio is an involuntary, jactura, a voluntary, loss, which a person undergoes, a sacrifice that is made to avoid a greater loss, as in the case of the master of a ship, who throws the freight overboard, to save his ship and his life. Plin. Ep. i. 12. Jacturam gravissimam feci, si jactura dicenda est tanti viri amissio. (iii. 289.)

Damnum · Detrimentum · Jactura

Damnum (δαπάνη) is a loss incurred by one’s self, in opp. to lucrum. Plaut. Cist. i. 1, 52. Capt. ii. 2, 77. Ter. Heaut. iv. 4, 25. Cic. Fin. v. 30. Sen. Ben. iv. 1. Tranq. 15; whereas detrimentum (from detrivisse) means a loss endured, in opp. to emolumentum. Cic. Fin. i. 16. iii. 29; lastly, jactura is a voluntary loss, by means of which one hopes to escape a greater loss or evil, a sacrifice. Hence damnum is used for a fine; and in the form, Videant Coss., ne quid resp. detrimenti capiat, the word damnum could never be substituted for detrimentum. (v. 251.)

Conjugation

active indicative
formpresentimperfectfutureperfectpluperfectfut. perfect
1st sg.iaciōiaciēbamiaciamiēcīiēceramiēcerō
2nd sg.iacisiaciēbāsiaciēsiēcistīiēcerāsiēceris
3rd sg.iacitiaciēbatiacietiēcitiēceratiēcerit
1st pl.iacimusiaciēbāmusiaciēmusiēcimusiēcerāmusiēcerimus
2nd pl.iacitisiaciēbātisiaciētisiēcistisiēcerātisiēceritis
3rd pl.iaciuntiaciēbantiacientiēcērunt
iēcēre
iēcerantiēcerint
active subjunctive
active subjunctive
formpresentimperfectperfectpluperfect
1st sg.iaciamiaceremiēcerimiēcissem
2nd sg.iaciāsiacerēsiēcerīsiēcissēs
3rd sg.iaciatiaceretiēceritiēcisset
1st pl.iaciāmusiacerēmusiēcerīmusiēcissēmus
2nd pl.iaciātisiacerētisiēcerītisiēcissētis
3rd pl.iaciantiacerentiēcerintiēcissent
passive indicative
passive indicative
formpresentimperfectfuture
1st sg.iacioriaciēbariaciar
2nd sg.iaceris
iacere
iaciēbāris
iaciēbāre
iaciēris
iaciēre
3rd sg.iacituriaciēbāturiaciētur
1st pl.iacimuriaciēbāmuriaciēmur
2nd pl.iaciminīiaciēbāminīiaciēminī
3rd pl.iaciunturiaciēbanturiacientur
passive subjunctive
passive subjunctive
formpresentimperfect
1st sg.iaciariacerer
2nd sg.iaciāris
iaciāre
iacerēris
iacerēre
3rd sg.iaciāturiacerētur
1st pl.iaciāmuriacerēmur
2nd pl.iaciāminīiacerēminī
3rd pl.iacianturiacerentur
imperative
imperative
formactivepassive
pres. 2nd sg.iaceiacere
pres. 2nd pl.iaciteiaciminī
fut. 2nd sg.iacitōiacitor
fut. 3rd sg.iacitōiacitor
fut. 2nd pl.iacitōte—
fut. 3rd pl.iaciuntōiaciuntor
infinitives & participles
infinitives & participles
formactivepassive
present infinitiveiacereiacī
perfect infinitiveiēcisseiactum esse
future infinitiveiactūrum esseiactum īrī
present participleiaciēns
iaciente, iacientem, iacientēs, iacientī, iacientia, iacientibus, iacientis, iacientīs, iacientium
—
perfect participle—iactus
iacta, iactā, iactae, iactam, iactārum, iactās, iacte, iactī, iactīs, iactō, iactōrum, iactōs
future participleiactūrus
iactūra, iactūrā, iactūrae, iactūram, iactūrārum, iactūrās, iactūre, iactūrī, iactūrīs, iactūrō, iactūrōrum, iactūrōs, iactūrum
iaciendus
iaciundus
gerundiaciendī, iaciendō, iaciendumsupineiactum, iactū

Phrases from Meissner's Latin Phrase-Book

iacturam alicuius rei facere
to throw away, sacrifice.
extra teli iactum, coniectum esse
to be out of range.

jăcĭo, jēci, jactum, 3, v. a. cf. διώκω, to pursue; Germ. jagen, to make go, cause to go, send; hence,
I. to throw, cast, fling, hurl.
I. Lit.: genu ad aliquem, to hit or push one with the knee, Plaut. Capt. 4, 2, 17: lapides, Cic. Mil. 15: fulmen in medium mare, id. Div. 2, 19: in quem scyphum de manu jacere conatus, Cic. Verr. 2, 4, 10: aridam materiam de muro in aggerem, Caes. B. G. 7, 24: se in profundum, Cic. Sest. 20: saxeam pilam ponto, Verg. A. 9, 712: ensem fluctibus mediis, id. ib. 10, 683: balearica plumbum Funda jacit, Ov M. 2, 728: libellos in faciem ejus, Suet. Claud. 15 fin.—Freq. of dice-throwing: talos, Plaut. As. 4, 1, 35; 5, 2, 54; Cic. Fin. 3, 16, 54: Venerem, id. Div. 2, 59, 121; Suet. Aug. 71.—
B. Transf.
1. To lay, set, establish, build, found, construct, erect: urbi fundamenta, Liv. 1, 12: vallum, id. 30, 10: aggere jacto, Caes. B. G. 2, 12: molem, id. B. C. 1, 25: muros, Verg. A. 5, 631; 9, 712: moles, Cic. Att. 9, 14, 1: novae domus fundamenta, Suet. Calig. 22; Ov. F. 4, 835: molem in mare, Dig. 43, 8, 2, § 8.—
2. To send forth, emit; to bring forth, produce: de corpore odorem, Lucr. 2, 846: igniculos, Cic. Att. 15, 26, 2: jacturas poma myricas, that will bear, Ov. A. A. 1, 747.—
3. To throw away: scuta jacere, fugereque hostes, more habent licentiam, Plaut. Trin. 4, 3, 27: vestem procul, Ov. M. 4, 357: is sua jecit humi arma, id. ib. 3, 127: pavidas pharetras, Val. Fl. 5, 427.—Esp., to throw overboard, Dig. 41, 2, 21, § 2; 14, 2, 2, § 7; to cast, shed: cornua, Ov. A. A. 3, 78.—
4. To throw, scatter, sow: volucres semina jacta legunt, Ov. M. 5, 485; id. H. 12, 17: jacto semine, Verg. G. 1, 104: seminibus jactis, id. ib. 2, 57; 6, 11; id. F. 1, 662: flores, id. A. 5, 79: lapides, id. E. 6, 41.—
5. To project as a shadow: nullam umbram, Plin. 2, 73, 75, § 183 sq.—
II. Trop.
A. To throw, cast: contumeliam in aliquem, Cic. Sull. 7, 23: injuriam in aliquem, id. Par. 4, 1: adulteria, to lay to one's charge, id. Planc. 12, 30: ridiculum, id. Or. 26, 87: id, quod proponendum fuit, permotis animis jacit ad extremum, id. Part. 13, 46: jecit quidam casus caput meum, in mediam contentionem, id. Fam. 1, 9, 13: probra in feminas illustres, Tac. A. 11, 13.—
B. To lay, set, establish: causae fundamenta, Cic. Fl. 2, 4: fundamenta pacis, id. Phil. 1, 1, 1: gradum atque aditum ad rem, id. Agr. 2, 15: odia in longum jacere, to strew, sow, Tac. A. 1, 69: fundamenta reipublicae, Suet. Aug. 28.—
C. To throw out in speaking, to let fall, intimate, utter, mention, declare: assiduas querelas, Cic. poët. Div 1, 8, 14: illud, quod jacis obscure, id. Att. 2, 7, 4: suspicionem, id. Fl. 3, 6: de lacu Albano, Liv. 5, 15: vera an vana, id. 6, 14: multo plura praesens audivit, quam in absentem jacta erant, id. 43, 8: Jugurtha inter alias jacit oportere, etc., Sall. J. 11: quaedam de habitu cultuque et institutis ejus, Tac. A 1, 11: fortuitos sermones, id. ib. 4, 68: ali quid per vaniloquentiam ac minas, id. ib 6, 31: multasque nec dubias significationes saepe jecit, Suet. Ner. 37: crimina non haec sunt nostro sine jacta dolore, Tib. 4, 14, 3.

Origins

From *(H)yeh₁- (“to throw”). According to Leppänen, the aorist form *(H)yéh₁kt ~ *(H)ih₁ként may have yielded an early Proto-Italic aorist of the shape *jēked ~ *jakond, to which iaciō was created as an innovative ye-present. Schrijver and De Vaan, however, derive the term from Proto-Italic *jak-i-, which De Vaan further traces back to Proto-Indo-European *(H)ih₁-k-(i-). Phonologically, a development of *Hih₁- > ī- may be expected, though Schrijver notes—citing the etymologies of vacuus and vannus—a regular development of *Hih₁- > ia- is also possible. De Vaan suggests that, even if the phonological outcome is not regular, the term might have been remodeled from earlier *īcio according to the model of pairs such as faciō ~ fēcī. Cognate with Ancient Greek ἵημι (híēmi, “to send, throw”).

Quick answers

What does iaciō mean in Latin?
iaciō, a verb, means “to throw, hurl, cast, fling; throw away; to lay, set, establish, build, found, construct, erect”.
What are the principal parts of iaciō?
iaciō, iacere, iēcī (third (-iō variant) conjugation).
How do you pronounce iaciō?
In classical Latin, [ˈja.ki.oː]; in ecclesiastical (church) Latin, [ˈjaː.t͡ʃi.o].