noun
sharing the same concern; mutual worry
Used when people share a common worry or anxiety. Often appears in formal or written contexts, and in the set phrase 同憂の士 (people who share the same concern).
彼らは同憂の士として集まった。
They gathered as people sharing the same concern.
この問題について、同憂の念を抱いている。
I share the same concern about this issue.