The word "熄火" is formed from the character "熄", meaning to extinguish, which combines the fire radical "火" indicating its relation to fire and the component "息" providing both phonetic cue and semantic notion of ceasing, with the second character "火" meaning fire; together they create a compound where the first character acts upon the second, resulting in the literal meaning of causing fire to stop, such as putting out flames or an engine stalling.