動詞 let-out:

1. express audibly; utter sounds (not necessarily words)
   同義詞：utter, emit, let out, let loose
2. make known to the public information that was previously known only to a few people or that was meant to be kept a secret
   同義詞：unwrap, disclose, let on, bring out, reveal, discover, expose, divulge, impart, break, give away, let out
3. bring out of a specific state
   同義詞：bring out, let out
4. make (clothes) larger
   同義詞：let out, widen

let-out

n.Chiefly British （名詞）【多用于英國】
A means of evasion or avoidance.
出路，擺脫：一種逃脫或躲避的方式