The Collaborative International Dictionary
Wrongheadedly
Wrongheaded \Wrong"head`ed\, a.
Wrong in opinion or principle; having a perverse
understanding; perverse. -- Wrong"head`ed*ly, adv. --
Wrong"head`ed*ness, n.
--Macaulay.
Wiktionary
wrongheadedly
adv. In a wrongheaded manner.
WordNet
wrongheadedly
adv. in a wrongheaded manner
Usage examples of "wrongheadedly".
The nature of the conflict in the gate I never did get clear -- who was trying to do what to whom, and why -- but Chementinski seemed convinced of two things: that his stepson perished in his behalf, wrongheadedly or not.