1. 放开,放松,释放：let go 放开,松手 | let loose 放开,放松,释放 | let off 放(炮,烟火),开(枪宽恕,从宽处理;免除

2. 放松,放开;放出：let in 让...进入;放...出来 | let loose 放松,放开;放出 | let off 放(炮开(枪宽恕

3. 释放：let it have its swing 任其自然 | let loose 释放 | let off 放出

4. 释放,放开：knock out 击倒,击晕 | let loose 释放,放开 | participate in 参加

verb

1. express audibly
utter sounds (not necessarily words)

e.g. She let out a big heavy sigh
He uttered strange sounds that nobody could understand

Synonym: utteremitlet out

2. turn loose or free from restraint

e.g. let loose mines
Loose terrible plagues upon humanity

Synonym: unleashloose