Definition: to make a long, low sound such as when expressing pain, unhappiness, etc. Level: C2
摔倒后，他痛苦地呻吟着。
He ___groaned with pain after the fall.
想到又要开一个漫长的会议，她呻吟了一声。
She ___groaned at the thought of another long meeting.
古老的门缓慢打开时发出吱嘎声。
The ancient door ___groaned as it slowly opened.
