expression, suru verb (irregular)
file for divorce
Formal expression used in legal or official contexts when submitting a divorce application.
彼女は弁護士を通して離婚を申請した。
She filed for divorce through her lawyer.
Refers to the divorce registration form itself, while 離婚を申請する is the act of filing it.
Compound of 離婚 (divorce) + を (object marker) + 申請する (to apply for).