wa-inna
And indeed
REM – prefixed resumption particle wa + ACC – accusative particle inna
Root Link: ا ن ن
ʿalaykum
over you
P – preposition + PRON – 2nd person masculine plural possessive pronoun kum
Root Link: ع ل ى
laḥāfiẓīna
(are) surely guardians
EMPH – emphatic prefix lām + N – accusative masculine plural active participle
Root Link: ح ف ظ