Latin word inimicum comes from Latin amicus, Latin ingratus (Thankless. Ungrateful. Unpleasant, disagreeable.), Latin -itiam

Detailed word origin of inimicum

Dictionary entry	Language	Definition
amicus	Latin (lat)	Friendly, amicable. Welcome, pleasing (Augustan and later) courtier, minister, counsellor. Male friend.
ingratus	Latin (lat)	Thankless. Ungrateful. Unpleasant, disagreeable.
-itiam	Latin (lat)
amic	Romanian (ron)	Friend; pal, buddy.
inimicitia	Latin (lat)	(usually in plural) Enmity, hostility, ill will.
inimicizia	Italian (ita)	Enmity.

Words with the same origin as inimicum