憎しみ
にくしみ · nikushimi · JLPT N1 · noun
hate
Heart radical 忄 + 曽 in 憎; 憎しみ is the noun form of 憎む (nikumu, to hate)
Hatred is the noun form of the verb 憎む (nikumu). The stem 憎み plus the noun ending しみ turns the verb into a feeling, so learn nikushimi as the noun partner of nikumu.