LATIN DICTIONARYLexicon Latīnum
adverb

properē

properē (not comparable)
Classical[ˈprɔ.pɛ.reː]Ecclesiastical[ˈprɔː.pe.re]

Meaning

  1. not comparablehastily, quickly, speedily
    Curius ubi intellegit, quantum periculum consuli inpendeat, propere per Fulviam Ciceroni dolum, qui parabatur, enuntiat. Ita illi ianua prohibiti tantum facinus frustra susceperant.When Curius learnt how great the danger which threatened the consul was, he hastily reported to Cicero, through Fulvia, the trap which was being prepared. When the men were thus turned away from the door, they had undertaken such a great crime in vain.c. 42 BCE, Gaius Sallustius Crispus, Bellum Catilinae 28.2–3

prŏpĕrē and prŏpĕrĭter,
I. advv., v. properus fin., A. and B.

Origins

From properus (“hasty”) + -ē (adverbial ending).

Quick answers

What does properē mean in Latin?
properē, a adverb, means “hastily, quickly, speedily”.
How do you pronounce properē?
In classical Latin, [ˈprɔ.pɛ.reː]; in ecclesiastical (church) Latin, [ˈprɔː.pe.re].