أساء

Compare سُوء (sūʔ, “evil, harm”).

أَسَاءَ • (ʔasāʔa) IV (non-past يُسِيءُ (yusīʔu), verbal noun إِسَاءَة (ʔisāʔa))

1. (intransitive) to do bad, to do wrong, to act badly, to act wrong
2. to harm, to mistreat

   أَحْسَنَ إِلَيْكَ سَعْدٌ بَيْنَمَا أَنْتَ أَسَأْتَ إِلَيْهِ

   ʔaḥsana ʔilayka saʕdun baynamā ʔanta ʔasaʔta ʔilayhi

   Saad treated you well, whereas you treated him badly

3. (transitive) to misunderstand (a statement, a remark))

   أَسَاءَ الْفَهْمَ

   ʔasāʔa l-fahma

   He misunderstood

4. (transitive) to do badly, to do wrong, to mishandle

   أَسَاءَ ٱسْتِعْمَالَ السِّكِّينِ فَجُرِحَ.

   ʔasāʔa stiʕmāla s-sikkīni fajuriḥa.

   He mishandled the knife and injured himself.

• (antonym(s) of “all senses”): أَحْسَنَ (ʔaḥsana)

'أساء' is not any of the forms of the form-I verb 'سَاءَ'