Webster's Revised Unabridged Dictionary · 1913

Loquacious

Loquacious , adjective

[Latin loquax, -acis, talkative, from loqui to speak; compare Greek {not transcribed} to rattle, shriek, shout.]

1.
Given to continual talking; talkative; garrulous.
Loquacious, brawling, ever in the wrong. — Dryden
2.
Speaking; expressive. [Rare] — J. Philips
3.
Apt to blab and disclose secrets.