What does cumprīmīs mean in Latin?

cumprīmīs, a adverb, means “first, first of all, before all others, better than all others; with the foremost, especially, particularly”.

Where does cumprīmīs come from?

Proto-Indo-European *ḱe? → Proto-Indo-European *ḱóm → Proto-Italic *kom → Old Latin com → Latin cumprīmīs.

adverb

first, first of all, before all others, better than all others
eradicare est certum cumprimis patrem, post id locorum matremI’m resolved to root out my father first and then my motherc. 189 BCE, Plautus, Truculentus 660
1719, William Musgrave, Antiquitates Britanno-Belgicae..., Vol. I, Cap. XII, § IThe first [statue] displays Venus... Received into Heaven, she presided over all things related to Whoring, which she was thought to understand before all others...
with the foremost, especially, particularly
Sed cumprimis mirandum est, quod ea, quae minime videri volunt nescireBut what is particularly remarkable, the very things that they least want to seem ignorant of are the ones they refuse to learnc. 125 CE – 180 CE, Apuleius, De deo Socratis 22

cumprīmis, v. 1. cum, II. D.

Latin primis Latin cumprimis From cum (“at”) + primis (“first”).