Definition
to refrain from doing something due to fear.
因為害怕而退縮或放棄
He originally planned to participate in the competition but ended up chickening out due to nerves.
他原本計劃參加比賽，但最後因為緊張而退縮了。
Before the speech, he felt uneasy and decided to chicken out.
在演講前，他感到不安，決定退縮。
When faced with bungee jumping, she chickened out at the last moment.
當面對蹦極時，她在最後一刻退縮了。