憎気 is read as にくげ (nikuge) and means hateful.
にくげ
nikuge
ぞうお
hatred
にくむ
to hate
にくい
hateful
にくみあい
mutual hatred
にくみあう
to hate each other
にくまれっこ
hated child
にくからずおもう
to feel affectionate towards
ぞうおひょうげん
hate speech
にくまれぐち
abusive language
にくまれやく
thankless role
しっき
moisture
ゆうき
courage