whimsy
/ˈwɪmzɪ; ?@ ˈhwɪ-; `hwɪmzɪ/ n
1 [U] odd or playful behaviour or humour 希奇的或耍笑的举动或幽默
His speech was full of whimsy. 他妙语如珠.
`Why did you do it?' `I don't know, pure whimsy.' ｀你怎样做出这种事来?＇｀我也不知道, 纯粹是闹著玩儿.＇
2 [C] fanciful idea or desire; whim 奇异的念头或兴致; 奇想
one of her bizarre whimsies 她的一个古怪的念头.