spark [spɑ:k]

以下由轻松背单词网站提供

n.火花，朝气，情人，俗丽的年轻人；vi.闪烁，冒火花，热情回应；vt.激发，引起，追求

a first small event or problem which causes a much worse situation to develop

A single spark can start a prairie fire. 星星之火，可以燎原。
What made the electric wire spark? 电线冒火花是什么原因？