LATIN DICTIONARYLexicon Latīnum
adverb

prōgnāriter

prōgnāriter (comparative prōgnārius, superlative prōgnārissimē)
Classical[proːŋˈnaː.rɪ.tɛr]Ecclesiastical[proɲˈɲaː.ri.ter]

Meaning

  1. Old Latinrarevery skilfully, very expertly
    divi hoc audite parumper, Ut pro Romano populo prognariter armis239 BCE – 169 BCE, Ennius, Annales 6.200–202
  2. Old Latinraredecisively, definitely
    Vin bene emere? — Vin tu pulchre vendere? — Ego scio hercle utrumque velle. —— Age, indica prognariter.c. 197 BCE, Plautus, Persa 4.4.39–40
    PRAEGNAVITER, strenue, fortiter et constanter. Plautus Persa: 'ego scio hercle utrumque belle.' — 'age, indica praegnaviter.'c. 280 CE, Nonius Marcellus, De compendiosa doctrina I 150

prō-gnārĭter, adv. id.,
I. very skilfully, very expertly (ante-class.): prognariter armis Certare, Enn. ap. Non. 150, 6 (Ann. v. 215 Vahl.): age, indica prognariter, decisively, definitely, Plaut. Pers. 4, 4, 39 Ritschl N. cr.; cf. Non. 150, 4, and 154, 30.

Origins

From unattested *prōgnārus + -ter or prō- + gnārus + -ter.

Quick answers

What does prōgnāriter mean in Latin?
prōgnāriter, a adverb, means “very skilfully, very expertly; decisively, definitely”.
How do you pronounce prōgnāriter?
In classical Latin, [proːŋˈnaː.rɪ.tɛr]; in ecclesiastical (church) Latin, [proɲˈɲaː.ri.ter].