1530s, "act of inflicting;" 1580s, "that which is inflicted," from Middle French infliction (15c.), or directly from Late Latin inflictionem (nominative inflictio) "an inflicting, a striking against," noun of action from past participle stem of Latin infligere "to strike or dash against" (see inflict).
he's not a friend, he's an infliction
inflection
inflexibility
inflexible
inflexion
inflict
infliction
in-flight
inflorescence
inflow
influence
influent