wa-inna
And indeed
CONJ – prefixed conjunction wa (and) + ACC – accusative particle inna
Root Link: ا ن ن
yu'minūna
believe
V – 3rd person masculine plural (form IV) imperfect verb + PRON – subject pronoun na
Root Link: ا م ن
bil-ākhirati
in the Hereafter
P – prefixed preposition bi + DET – determiner prefix al + N – genitive feminine singular noun
Root Link: ا خ ر
lanākibūna
surely (are) deviating
EMPH – emphatic prefix lām + N – nominative masculine plural active participle
Root Link: ن ك ب