noun, noun or participle which takes 'suru', intransitive verb
Literary or formal word for moaning or groaning, often from pain, suffering, or distress. Can be used as a noun or as a suru-verb (呻吟する).
彼は傷の痛みに一晩中呻吟した。
He moaned all night from the pain of his wound.
病室
The groans of patients can be heard from the sickroom.