As an adverb inadvertently
is unintentionally, because of an oversight.
As an adjective intentional is
intended or planned; done deliberately or voluntarily.
Other Comparisons: What's the difference?
unintentionally, because of an oversight
* 2013 , Chris Bevan, "
Borussia Dortmund 0-1 Arsenal", BBC Sport , 6 November 2013:
- Neven Subotic hooked a volley wide after Ramsey inadvertently headed a Reus free-kick back into the danger zone, and Blaszczykowski was also off target when he met Kevin Grosskreutz's cross.
Intended or planned; done deliberately or voluntarily.
(legal) Done with intent.