LATIN DICTIONARYLexicon Latīnum
English → Latin

“principal” in Latin

The English word principal itself goes back to Latin prīmus, through prīncipālis.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

principal adj.
primus, princeps, principalis (the first and most important; the latter post-Augustan): praecipuus (chief): potissimus (by far preferable, beyond comparison): summus, maximus (greatest): in a principal manner, praecipue: potissimum: imprimis, maxime.
principal s.
A chief person, caput: princeps: praepositus: praesul: principal of a college or school, gymnasiarchus.
Money laid out at interest, sors: caput: vivum (as opposed to “the interest”): pecuniae: nummi: res (money generally): that the woman’s principal might be safer, ut mulieri esset res cautior, etc. (Cic., Coecin., 4, 11): principal lying idle, pecuniae otiosae or vacuae, pecuniae steriles: the principal lies idle, pecuniae otiosae jacent: to live on the interest of principal de fenore vivere: to deduct what is owed from principal, aes alienum de capite deducere: to deduct from principal, de vivo detrahere: the interest due is greater than the principal, mergunt sortem usurae: principal arises from interest, sors fit ex usura.

Quick answer

What is the Latin word for principal?
The usual Latin words for “principal” are prīncipālis, praecipuus, pote; also superus, magnus, imprimō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.