kunnā
we were
V – 1st person plural perfect verb + PRON – 1st person plural object pronoun nā
Root Link: ك و ن
fa-ir'taddā
So they returned
REM – prefixed resumption particle fa + V – 3rd person masculine dual (form VIII) perfect verb + PRON – subject pronoun ā
Root Link: ر د د
āthārihimā
their footprints
N – genitive masculine plural noun + PRON – 3rd person masculine dual possessive pronoun himā
Root Link: ا ث ر