形容詞 whimsical:

1. determined by chance or impulse or whim rather than by necessity or reason
   同義詞：capricious, impulsive

1. Capricious or whimsical.
   反復無常的，三心兩意的
2. An odd, whimsical, or stubborn notion.
   怪念頭奇怪的、奇異的或頑固的想法
3. It's only a whimsical story for children.
   這不過是一個希奇古怪的兒童故事。
4. He has a whimsical sense of humor.
   他有著離奇的幽默感。

whim.si.cal

adj.（形容詞）
Determined by, arising from, or marked by whim or caprice.See Synonyms at arbitrary
異想天開的：因心血來潮或異想天開而做決定的，由此引起或具有其特性的參見 arbitrary
Erratic in behavior or degree of unpredictability:
反復無常的：行為舉止反復無常的：
例句：
a whimsical personality.
變化無常的個性

來源：
From whimsy
源自 whimsy

【引伸】
whim.sically
adv.（副詞）