Idoneus homo.—A fit man.
Ignoramus.—We are ignorant.
Ignorantia legis neminem excusat.—Ignorance of the law excuses no one.
Il a le diable au corps.—The devil is in him.
Imitatores, servum pecus.—Imitators, a servile herd.
Imperium in imperio.—One government existing within another.
Impransus.—One who has not dined.
Imprimatur.—Let it be printed.
Imprimis.—In the first place.
Impromptu.—A prompt remark without study.