Old English wilfullÄ«Ä‹e, corresponding to wilful +"Ž -ly.
From
Wiktionary
Wilfully Sentence Examples
Is it on the Sun for wilfully misunderstanding the " chav " thing again?
The penalty for wilfully obstructing or delaying an authorized officer is a maximum fine at level five.
Not when their supposed superiority is thrust so wilfully down throats.
From psychedelic folk to space prog The Beta Band, made some of the most intriguing, yet wilfully perverse music of the â90s.
At Milan it was more serious and lasted longer than elsewhere, as the movement was controlled by the anarchists under Arturo Labriola; the hooligans committed many acts of savage violence, especially against those workmen who refused to strike, and much property was wilfully destroyed.