Định nghĩa của từ will-o’-the-wisp

will-o’-the-wispnoun
ma trơi
/ˌwɪl ə ðə ˈwɪsp//ˌwɪl ə ðə ˈwɪsp/

Word Originearly 17th cent.: originally as Will with the wisp, the sense of wisp being ‘handful of (lighted) hay’.

a thing that is impossible to obtain; a person that you cannot depend on

a blue light that is sometimes seen at night on soft, wet ground and is caused by natural gases burning

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