1An adverb emphasizing that something is nothing more than what is stated, with no additional reason or meaning; often used as 単に〜だけ ("merely just...").
これは単に噂に過ぎず、事実ではない。
This is merely a rumor, not a fact.
単に忙しいというだけの理由で連絡を怠ってはいけない。
You shouldn't neglect to keep in touch just because you're busy.
彼の失敗は単に運が悪かっただけではない。
His failure wasn't simply due to bad luck.
この問題は単に技術的な問題にとどまらない。
This issue isn't limited to being merely a technical problem.