LATIN DICTIONARYLexicon Latīnum
adverb

nīmīrum

nīmīrum (not comparable)
Classical[niːˈmiː.rũː]Ecclesiastical[niˈmiː.rum]

Meaning

  1. not comparablewithout a doubt, no doubt, of course
  2. not comparableevidently, forsooth

nīmīrum, adv. ni, i. q. ne mirum, v. ni, I.; lit. not wonderful; cf., less strong than mirum ni; v. ni, III. A. β; hence, to introduce an assertion as indisputable,
I. without doubt, doubtless, indisputably, certainly, surely, truly: nimirum homines frigent, are certainly received coolly, Ter. Eun. 2, 2, 37: nimirum Themistocles est auctor adhibendus, Cic. Off. 2, 20, 71: non parva res, sed nimirum omnium maxima, id. Mur. 22, 45: et nimirum is princeps ex Latinis, id. Brut. 21, 82: is est nimirum Soter, qui salutem dedit, Cic. Verr. 2, 2, 63, § 154; id. Leg. 2, 1, 3; id. de Or. 1, 4, 16; id. Or. 23, 75: non omnia nimirum eidem di dedere, truly, Liv. 22, 51: nimirum haec illa Charybdis, etc., Verg. A. 3, 558: cui placet alterius sua nimirum est odio sors, of course, Hor. Ep. 1, 14, 11.—After a question: sed quid id ad rem? nimirum, inquit, in eo causa consistit, Cic. Quint. 25, 79. —
II. Freq. in an ironical sense, doubtless, to be sure, forsooth: aperienda nimirum nocte janua fuit, Liv. 40, 9: uni nimirum tibi recte semper erunt res, Hor. S. 2, 2, 106; 2, 3, 120; id. Ep. 1, 9, 1; 1, 15, 42; Juv. 2, 104; Tac. H. 1, 33: nimirum summi ducis est occidere Galbam, id. A. 2, 82.

Origins

Univerbation of nī, mīrum ("if not, that would be odd").

Quick answers

What does nīmīrum mean in Latin?
nīmīrum, a adverb, means “without a doubt, no doubt, of course; evidently, forsooth”.
How do you pronounce nīmīrum?
In classical Latin, [niːˈmiː.rũː]; in ecclesiastical (church) Latin, [niˈmiː.rum].