whim [wɪm]

以下由轻松背单词网站提供

n.一时的兴致，突然的念头；奇想，幻想

a sudden wish or idea , especially one that cannot be reasonably explained

I bought the encyclopedia on a whim. 我凭一时的兴致买了这本百科全书。
He had a sudden whim to go sailing today. 今天他突然想要去航海。