名詞 back down:

1. a retraction of a previously held position
   同義詞：withdrawal, backdown, climb-down

動詞 back down:

1. move backwards from a certain position
   同義詞：back up, back off
2. remove oneself from an obligation
   同義詞：chicken out, back off, pull out, bow out

1. After being shown conclusive evidence, the other side had to back down.
   出示確鑿的證據之后，對方不得不作出讓步。
2. He hated to tuck his tail and back down now.
   他討厭此時夾著尾巴退回來。
3. After several hours’ negotiations, they finally backed down on their unreasonable demands.
   經過幾個小時的談話后，他們終于放棄了不合理的要求。
4. He proved that he was right and his critics had to back down.
   他證明了他是正確的，而那些非難他的人不得不收起他們那一套。