LATIN DICTIONARYLexicon Latīnum
adverb

reāpse

reāpse (not comparable)
Classical[reˈaːp.sɛ]Ecclesiastical[reˈap.se]

Meaning

  1. not comparablein reality; in fact; in practice
    Idem istuc ipsa, etsī tū taceās, reāpse experta intellegō.You don't need to tell me, I know that by my own personal experience.T. Maccius Plautus, Truculentus 815
    Obiciuntur etiam saepe fōrmae, quae reāpse nūllae sunt, speciem autem offerunt.Apparitions often present themselves, and though they have no real substance, they seem to have it.M. Tullius Cicero, De Divinatione
  2. modalnot comparableactually; really

Phrases from Meissner's Latin Phrase-Book

re (vera), reapse (opp. specie)
in truth; really.

rēapse, adv. contr. from re and eapse, an old form for ipsā; hence in tmesi: reque eapse, Scip. Afr. ap. Fest. p. 286, 3; cf. ipse init.,
I. in fact, in reality, actually, really (an old word, which does not occur after Cic.): reapse est re ipsā, Fest. p. 278 Müll.; Plaut. Truc. 4, 3, 41: earum ipsarum rerum reapse, non oratione perfectio, Cic. Rep. 1, 2, 2: ut reapse cerneretur, quale esset id, quod, etc., id. ib. 2, 39, 66; cf. Sen. Ep. 108, 32: obiciuntur etiam saepe formae, quae reapse nullae sunt, speciem autem offerunt, Cic. Div. 1, 37, 81: non perinde, ut est reapse, ex litteris perspicere potuisti, id. Fam. 9, 15, 1: quod idem reapse primum est, id. Fin. 5, 10, 27.

Origins

Univerbation of rē + eāpse, an older form of ipsā, later perhaps interpreted as ab + sē. Eventually replaced/renewed by rē ipsā.

Quick answers

What does reāpse mean in Latin?
reāpse, a adverb, means “in reality; in fact; in practice”.
How do you pronounce reāpse?
In classical Latin, [reˈaːp.sɛ]; in ecclesiastical (church) Latin, [reˈap.se].