Latin imperfectus

← Proto-Italic *emperifaktos (inherited)

← Latin in- (affix)

← Latin perfectus (affix)

→ English imperfect (derived)

→ Catalan imperfecte (derived)

→ Spanish imperfecto (derived)

→ French imparfait (derived)

→ Middle French imperfaict (derived)

→ Italian imperfetto (derived)

→ Portuguese imperfeito (derived)