Romanian word infinit comes from Latin ingratus (Thankless. Ungrateful. Unpleasant, disagreeable.), Latin finitus

Detailed word origin of infinit

Dictionary entry	Language	Definition
ingratus	Latin (lat)	Thankless. Ungrateful. Unpleasant, disagreeable.
finitus	Latin (lat)
infinitus	Latin (lat)	Boundless, unlimited, endless. Infinite.
infinit	Romanian (ron)

Words with the same origin as infinit