"state of being inferior," 1590s, probably from Medieval Latin *inferioritas; see inferior + -ity. Inferiority complex first attested 1919.
The surrender of life is nothing to sinking down into acknowledgment of inferiority. [John C. Calhoun, Senate debate, Feb. 19, 1847]
infelicity
infer
inference
inferential
inferior
inferiority
infernal
inferno
infertile
infertility
infest