ingratitude

n [U] lack of gratitude 忘恩负义.

ingenious, ingeniously, ingenue, ingenuity, ingenuous, ingenuously, ingenuousness, ingest, ingle-nook, inglorious, ingloriously, ingoing, ingot, ingrain, ingrained, ingrate, ingratiate, ingratiating, ingratiatingly, ingratiation, ingredient, ingress, ingrowing, inhabit, inhabitable, inhabitant, inhale, inhaler, inharmonious, inharmoniously, inharmoniousness, inherent, inherently, inherit, inheritance, inheritor, inhibit, inhibited, inhibitedly, inhibition,