- not fitted with a bridle
- an unbridled horse
- without restraint or limit
- She jumped into the project with unbridled enthusiasm.
1749, Henry Fielding, The History of Tom Jones, a Foundling, London: A[ndrew] Millar, OCLC 928184292:
- The doctor now interposed, and prevented the effects of a wrath which was kindling between Jones and Thwackum; after which the former gave a loose to mirth, sang two or three amorous songs, and fell into every frantic disorder which unbridled joy is apt to inspire […]
without restraint or limit
- simple past tense of