is a specific kind of: break, bring out, disclose, discover, divulge, expose, give away, let on, let out, reveal, uncover, unwrap.

verb group: spill, talk.

is the opposite of: keep one's mouth shut, keep quiet, shut one's mouth.

derivation: singing, tattle, telling | talk, talk of the town | betrayer, blabber, informer, rat, squealer | blabbermouth, talebearer, taleteller, tattler, tattletale, telltale | bigmouthed, blabbermouthed, blabby, talkative.