What it means
わざと is an adverb meaning that someone deliberately does something, rather than doing it by accident. It commonly modifies an action or event and can suggest that the action was unpleasant, troublesome, or contrary to what was expected. It is placed before the verb or the larger predicate it modifies.
Usage note
わざと is different from わざわざ, which means going out of one's way to do something. わざと focuses on intention, while わざわざ focuses on the extra effort or trouble involved.
How to use it
彼はわざと窓を開けます。
He opens the window on purpose.
彼はわざと窓を開ける。
He opens the window on purpose.
Example sentences
弟はわざと私の名前を間違えて、笑いました。
My younger brother deliberately got my name wrong and laughed.
彼女はわざと電気を消さずに部屋を出た。
She deliberately left the room without turning off the light.
健太はわざと宿題を家に置いてきた。
Kenta intentionally left his homework at home.