The Collaborative International Dictionary of English v.0.48:
Foolishly \Fool"ish*ly\, adv. In a foolish manner. [1913 Webster]WordNet (r) 3.0 (2006):
foolishly adv 1: without good sense or judgment; "He acted foolishly when he agreed to come" [syn: foolishly, unwisely] [ant: sagely, wisely]