عمداً، از روی قصد
For a reason, deliberately
NOTE: This idiom is usually used when someone does something wrong or unfair.
Do you think that she didn't come to the meeting on purpose?
آیا فکر می کنی که او عمداً به جلسه نیامد؟
It was no accident that he broke my glasses. He did it on purpose.
او تصادفی عینک مرا نشکست. عمداً این کار را انجام داد.