Loquacious

Part of speech: adjective (a.)

1. Given to continual talking; talkative; garrulous. Loquacious, brawling, ever in the wrong. Dryden.

2. Speaking; expressive. [R.] J. Philips.

3. Apt to blab and disclose secrets.

Synonyms: Garrulous; talkative. See Garrulous.