English Translation
He was in agony.
Tip: 苦しみ悶える（もだえる）is completely interchangeable with 苦しみもがく. You can check many other similar expressions here.
He was in agony.
Tip: 苦しみ悶える（もだえる）is completely interchangeable with 苦しみもがく. You can check many other similar expressions here.