tu'minū
you believe
V – 2nd person masculine plural (form IV) imperfect verb, jussive mood + PRON – subject pronoun waw
Root Link: ا م ن
fa-iʿ'tazilūni
then leave me alone
REM – prefixed resumption particle fa + V – 2nd person masculine plural (form VIII) imperative verb + PRON – subject pronoun waw + PRON – 1st person singular object pronoun nī
Root Link: ع ز ل