怪 is one of the most commonly used Japanese kanji, and it also has a lot of special readings in addition to the standard onyomi and kunyomi readings.
ONYOMI 音読み
あや.しい aya.shii あや.しむ aya.shimu
KUNYOMI 訓読み
カイ kai ケ ke
Examples
ケンさん、君は本気かい。Are you on the level, Ken?熱があるかい。Have you any fever?そう思うかい?Do you think so?用意はいいかい。Are you ready?一緒にくるかい。Do you want to come along?それは確かかい。Can I take your word for it?もう終わったかい?Have you finished yet?君は彼より若いのかい。Are you younger than him?トミー、聞こえるかい?Tommy, can you hear me?その本全部読んだかい。Did you read the whole book?