To Hold A Grudge
transitive verb, godan verb
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means grudge and the verb vocab version is to hold a grudge.
うらむ
Who do you hold a grudge against the most? That would be you, Ra (うら). You and your dumb sun.
どうしてあのスタントマンを恨んでいるんだい？
Why do you have a grudge against that stuntman?