wa-innā
And indeed we
CONJ – prefixed conjunction wa (and) + ACC – accusative particle inna + PRON – 1st person plural object pronoun ā
Root Link: ا ن ن
rabbinā
our Lord
N – genitive masculine noun + PRON – 1st person plural object pronoun nā
Root Link: ر ب ب
lamunqalibūna
will surely return
EMPH – emphatic prefix lām + N – nominative masculine plural (form VII) active participle
Root Link: ق ل ب