A sudden or capricious impulse or idea; a passing fancy.
On a whim, she decided to take a spontaneous road trip to the mountains.
(Mining, historical) A hoisting machine consisting of a vertical drum turned by horse or steam power, used for raising ore, water, or workers in a mine shaft.
The old Cornish mine still has an intact wooden whim beside the shaft.
whimverb
(Mining, historical) To raise or haul (ore, water, etc.) by means of a whim.
They whimmed the buckets of ore to the surface throughout the night.