whim
/wɪm; ?@ hwɪm; hwɪm/ n
sudden desire or idea, esp an unusual or unreasonable one; caprice 一时的兴致; 突然的念头; （尤指）突发奇想, 异想天开; 心血来潮
It's only a passing whim, ie one that will soon be forgotten. 这只不过是一闪之念.
They seem ready to indulge (ie satisfy) his every whim. 他们简直惯著他随心所欲.