Source : Webster's Revised Unabridged Dictionary (1913)

Promiscuously \Pro*mis"cu*ous*ly\, adv.
   In a promiscuous manner.

Source : WordNet®

promiscuously
     adv 1: in an indiscriminate manner; "she reads promiscuously" [syn:
             {indiscriminately}]
     2: in a licentious and promiscuous manner; "this young girl has
        to share a room with her mother who lives promiscuously"
        [syn: {licentiously}, {wantonly}]