Injury
noun, する verb
Do you know how suspicious I get if I have an injury? I start suspecting everyone around me of having given me the injury. It was you, wasn't it?
けが
This is a jukugo word that uses the on'yomi for both kanji. You haven't learned this reading for 怪 yet, so here's a mnemonic to help you:
I get so suspicious about my injury that all my 毛 (け) stands on end.
昨日、娘が学校で怪我をしてしまいました。
Yesterday, my daughter was injured at school.
怪獣だって病気や怪我をします。
Even monsters get sick and injured.
あの子の大怪我の原因って、バナナの皮らしいよ。
I heard that the cause of that child's serious injury was a banana peel.