wanton
Adjective
1
a
: MERCILESS, INHUMANE
wanton cruelty
b
: having no just foundation or provocation : MALICIOUS
a wanton attack
2
: being without check or limitation: such as
a
: unduly lavish : EXTRAVAGANT
wanton imagination
b
: luxuriantly rank
wanton vegetation
3
a
: LEWD, BAWDY
b
: causing sexual excitement : LUSTFUL, SENSUAL
4
a
: playfully mean or cruel : MISCHIEVOUS
b
archaic : hard to control : UNDISCIPLINED, UNRULY
Source