فَلَا تَقُلْ لَهُمَا أُفٍّ وَلَا تَنْهَرْهُمَا
Do not say even “uff” to them, and do not rebuke them.
The wording directly prohibits saying even “uff” and rebuking one’s parents. Its reason—preventing harm and disrespect—is evident from ordinary linguistic understanding.
Through dalālat al-naṣṣ, more serious forms of abuse, such as hitting or humiliating parents, are included in the prohibition. If even the lighter expression of annoyance is forbidden, more severe injury cannot reasonably fall outside the identified rationale.
This does not rewrite the dictionary meaning of “uff.” It recognizes the reason communicated by the prohibition and finds it in a stronger instance.