LATIN DICTIONARYLexicon Latīnum
adverb

examussim

examussim (comparative examussius, superlative examussissimē)
Classical[ɛk.saˈmʊs.sĩː]Ecclesiastical[eɡ.zaˈmus.sim]

Meaning

  1. according to the carpenter's rule, exactly, precisely, perfectly
    Sos. Ne ista edepol, si haec vera loquitur, examussim est optima.Sosia. Surely she, by Pollux, if this woman speaks truthful things, is exactly perfect.c. 190 BCE – 185 BCE, Plautus, Amphitruo 2.2
    Utque fallaciae reliqua convenirent, ceram in modum prosectarum formatam aurium ei adplicant examussim nasoque ipsius similem comparant.And so that their deceits might agree with the rest, they apply to him wax formed exactly in the manner of cut-off ears, and prepare a nose similar to his own.c. 125 CE – 180 CE, Apuleius, Metamorphoses 2.30

ex-ămussim, adv. amussis, by the rule, i. e.,
I. exactly, precisely, perfectly (= ad amussim, Varr. R. R. 2, 1, 26; Gell. 1, 4, 1; 20, 1, 34); cf. Sisenn. ap. Charis. p. 178; Non. 9, 6 sq.; p. 80, 19 Müll. (ante- and post-class.): aedes Factae probe, examussim, Plaut. Most. 1, 2, 19: rem examussim disputare, id. Men. prol. 50; App. M. 2, p. 128, 13: nae ista edepol ... examussim est optuma, Plaut. Am. 2, 2, 213; App. M. 4, p. 150, 33; id. ib. 11, p. 271; cf. Hand, Turs. II. p. 664.

Origins

From amussis (“carpenter's rule”).

Quick answers

What does examussim mean in Latin?
examussim, a adverb, means “according to the carpenter's rule, exactly, precisely, perfectly”.
How do you pronounce examussim?
In classical Latin, [ɛk.saˈmʊs.sĩː]; in ecclesiastical (church) Latin, [eɡ.zaˈmus.sim].