A state of deep-seated ill-will is characterized by HOSTILITY, GRUDGE, RANCOR, INNER, INBRED, INTRINSIC, and INNATE feelings. HOSTILITY is a strong feeling of dislike or enmity, while a GRUDGE is a long-standing resentment or ill-will. RANCOR is a bitter, long-lasting resentment or ill-will. INNER refers to something that is inside or inherent, while INBRED is something that is INNATE or inherited. INTRINSIC means something that is essential or inherent, and INNATE means something that is inborn or natural. All of these words describe a state of deep-seated ill-will, which is a feeling of intense animosity or hatred that has been held for a long period of time.