innahum
Indeed they
ACC – accusative particle inna + PRON – 3rd person masculine plural object pronoun Ha
Root Link: ا ن ن
kānū
were
V – 3rd person masculine plural perfect verb + PRON – subject pronoun waw
Root Link: ك و ن
mut'rafīna
indulging in affluence
N – accusative masculine plural (form IV) passive participle
Root Link: ت ر ف