אָר֕וּר מַקְלֶ֥ה אָבִ֖יו וְאִמּ֑וֹ וְאָמַ֥ר כָּל־הָעָ֖ם אָמֵֽן׃ (ס)
Maldito quem golpear seu pai ou sua mãe. E todo o povo dirá: Amém. {ס}
Rashi
מקלה means, “making light of”, it has the same meaning as (Deuteronomy 25:3) “Lest … thy brother become despicable (נקלה).
Ibn Ezra
The word disgraces is a transitive word, derived from the noun “disgrace” [Hosea 4: 18].
Or HaChaim
ארור מקלה אביו ואמו, "Accursed is anyone who degrades his father or his mother." It is important to examine why Moses selected that only people guilty of non-observance of these eleven out of a total of 613 commandments were deserving to be publicly declared as being accursed? Are there not some more severe violations, such as the violation of commandments dealing with incest which would qualify no less for the treatment we see here accorded to the violators of these eleven commandments? Is it not difficult to consider adultery as less serious than moving a boundary stone, for instance?