Latin irritus

← Proto-Indo-European *reh₁- (root)

← Proto-Indo-European *h₁er- (inherited)

← Proto-Italic *enratos (inherited)

← Proto-Italic *en- (mention)

← Proto-Italic *ratos (mention)

← Proto-Italic *rēōr (mention)

← Latin ratus (cognate)

← Latin reor (cognate)

← Latin inratus (link)

← Latin inritus (link)

→ Latin ratus (link)