"of or pertaining to the Negro race," 1851, from Negro + -itic. Nigritic (1883) is especially "of or pertaining to the (dark-skinned) Oceanic races," though formerly they were used somewhat interchangeably.
negotiate
negotiation
negotiator
Negress
negrification
Negritic
negritude
Negro
negroid
Negrophile
Negrophobe