Final-weak verbs can retain different final short vowels when the weak radical is omitted in the jussive.
IndicativeJussiveSubjunctive
يَدْعُولَمْ يَدْعُلَنْ يَدْعُوَ
يَرْمِيلَمْ يَرْمِلَنْ يَرْمِيَ
يَرْضَىلَمْ يَرْضَلَنْ يَرْضَى
Know the actual stem and the governing particle; “final-weak” alone does not predict every vowel.
Opening interactive controls...
Advanced Sarf Application: Ambiguous Forms, Weak-Letter Reasoning and Error Correction
Final-weak verbs can retain different final short vowels when the weak radical is omitted in the jussive.
IndicativeJussiveSubjunctive
يَدْعُولَمْ يَدْعُلَنْ يَدْعُوَ
يَرْمِيلَمْ يَرْمِلَنْ يَرْمِيَ
يَرْضَىلَمْ يَرْضَلَنْ يَرْضَى
Know the actual stem and the governing particle; “final-weak” alone does not predict every vowel.