a whim is a form of:

Whim



noun
1.
(A sudden fancy, idle and passing notion, caprice, fad) ការប្រើសេះជាកម្លាំង, កបិចិត្ដ (ចិត្ដសាវ៉ា, រប៉ិលរប៉ូច), ការផ្លាស់ប្ដូរ, ចម្លែក
Example: Dara says he wants to travel, but it's only a whim.
Example: It's only a passing whim.
2.
(បច្ចេកទេស) កបិចិត្ត, ចិត្តភ្លើតភ្លើន
ENGLISH MEANING
noun
1.
The European widgeon.
2.
A sudden turn or start of the mind; a temporary eccentricity; a freak; a fancy; a capricious notion; a humor; a caprice.
3.
A large capstan or vertical drum turned by horse power or steam power, for raising ore or water, etc., from mines, or for other purposes; -- called also whim gin, and whimsey.
verb
1.
(INTRANSITIVE) To be subject to, or indulge in, whims; to be whimsical, giddy, or freakish.
1.
caprice, fancy, humor, notion, quirk, thought, urge, vagary, whimsy