1. in a wanton manner - the animals were killed wantonly for sport • Derived from adjective: wanton 2. in a licentious and promiscuous manner - this young girl has to share a room with her mother who lives promiscuously • Syn: licentiously, promiscuously • Derived from adjective: promiscuous (for: promiscuously), wanton, licentious (for: licentiously)