1. 心情浮动的：whimsey 怪念头 | whimsical 心情浮动的 | whimsicality 心情浮动

2. 古怪的;异想天开的：战争,冲突warfare | 古怪的,异想天开的whimsical | 运动会sports meet

3. 異想天開的色彩：Opaque 不透明色 | Translucent 半透明色 | Whimsical 異想天開的色彩

4. 变化无常：groundbreaking开创性的 | Whimsical变化无常 | urn骨灰盒

1. 怪异的;反复无常的;不切实际的
A whimsical person or idea is unusual, playful, and unpredictable, rather than serious and practical.

e.g. McGrath remembers his offbeat sense of humor, his whimsical side...
麦格拉思记得他不同寻常的幽默感和他古怪的一面。
e.g. His graphic art became slighter and more whimsical.
他的平面艺术变得越来越无足轻重，越来越异想天开。

adj

1. determined by chance or impulse or whim rather than by necessity or reason

e.g. a capricious refusal
authoritarian rulers are frequently capricious
the victim of whimsical persecutions

Synonym: capriciousimpulsive