Wanton

1. (archaic) Undisciplined, unruly; not able to be controlled.
2. (obsolete) Playful, sportive; merry or carefree.
3. Lewd, immoral; sexually open, unchaste.
4. Capricious, reckless of morality, justice etc.; acting without regard for the law or the well-being of others; gratuitous.
5. (archaic) Extravagant, unrestrained, excessive.

Synonyms

• (undisciplined)
• (playful, overly happy): frolicsome, playful
• (lewd): lewd, lustful, unchaste
• (capriciously violent): inhumane, callous, merciless
• (luxuriant): extravagant, lavish, luxuriant, prodigal, unrestrained