To suffer; to experience pain, distress, or hardship (physically or mentally).
長い間病気に苦しんだ後、ようやく退院できた。
After suffering from illness for a long time, he was finally able to be discharged from hospital.
彼女は仕事のストレスで夜も眠れずに苦しんでいる。
She is suffering from work-related stress and can't sleep at night.
政治的・経済的な問題で国民が苦しんでいる。
The people are suffering because of political and economic problems.
息が苦しくて、彼は胸を押さえて苦しんだ。
He had difficulty breathing and clutched his chest in pain.