adverb. ['ˈwɔntənli, ˈwɑːntənli'] in a licentious and promiscuous manner.
1. Adverb Separation anxiety, boredom and teething can all cause your dog to wantonly destroy his bed.
1. The guy in bed with her was not Nathan. Which meant Elle was buck-naked and wantonly riding the wrong guy. - Katee Robert, Wrong Bed, Right Guy