whim

whim
noun
  1. a sudden desire or change of mind, especially one that is unusual or unexplained
    突然产生的念头;一闪而过的念头;异想天开的念头;怪念头
    she bought it on a whim.
    她一时心血来潮地买了它。
    [mass noun]he appeared and disappeared at whim.
    他随心所欲地现身或消失。
  2. (archaic)a windlass for raising ore or water from a mine
    (古)(提升矿石或打水用的)绞绳滚筒,绞盘
语源
  1. late 17th cent.: of unknown origin. Sense 2 (mid 18th cent.) is a transferred use
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