1) In a willful manner 2) Wilfully 1) On purpose 2) Wilfully 
(adj) An act or specifically a crime done intentially with a motive, knowing the consequences of such action is considered as an act done willfully. So to make it a willfully done act it must have done with an intention to achieve the events or crime ought to happen. So if a dog was injured when a paper weight was slipped form someone's hand cannot...
Committed voluntarily and purposely, with the specific intent to do something; voluntarily and intentionally assisting or advising another to do something that the person knows disobeys or disregards the law. A person does not act "willfully" if the person acts as a result of a good faith misunderstanding of the requirements of the law. Intent an.....
Intentionally, as distinguished from accidentally, carelessly or inadvertently, but not necessarily maliciously.
[adv] - in a willful manner
wilfully adverb in a willful manner; `she had willfully deceived me`