inexpert, a. maladroit, [unskillful], [bungling].
inexpressible, a. ineffable, [unspeakable], [unutterable].
infallibility, n. inerrability.
infallible, a. inerrable, [unerring], [sure], [certain], [undeniable].
infamous, a. disreputable, [ignominious], [scandalous], opprobrious, [odious], [heinous].
infamy, n. [disgrace], [ignominy], [odium], obloquy, opprobrium.
infancy, n. [babyhood]; [minority], nonage, [pupilage].
infantile paralysis. poliomyelitis.
infatuate, v. enamor, [charm]. Antonyms: [repel], [disgust], [disillusionize].