let-out

(v) express audibly; utter sounds (not necessarily words)
- She let out a big heavy sigh
- He uttered strange sounds that nobody could understand
let loose, utter, emit,
(v) make known to the public information that was previously known only to a few people or that was meant to be kept a secret
- The auction house would not disclose the price at which the van Gogh had sold
- The actress won't reveal how old she is
- bring out the truth
- he broke the news to her
- unwrap the evidence in the murder case
disclose, divulge, let on, expose, give away, reveal, unwrap, discover, bring out, break,
(v) bring out of a specific state bring out,
(v) make (clothes) larger
- Let out that dress--I gained a lot of weight
widen,

let loose utter emit disclose divulge let on expose give away reveal unwrap discover bring out break widen

take in

let on

let off