godan verb (-u), transitive verb
curse; put a curse on; detest intensely
Covers both literal cursing (magical or ritual) and figurative intense hatred. The figurative use is strong and emotional, similar to 'loathe' or 'curse one's fate'.
魔女は彼に死の呪いをかけると言って呪った。
The witch cursed him, saying she would put a death curse on him.
彼
He cursed his friend who betrayed him from the bottom of his heart.