verb · to lose momentum, quiet down, or stop being active in a figurative sense

看到老板走进来，原本吵闹的人群立刻熄火了。

verb · to go out or be put out, specifically regarding a fire, lamp, or stove

他离开前确认了炉火已经熄火。

verb · of an engine or vehicle, to stop running or cut out unexpectedly

这辆旧车在爬坡时突然熄火了。