fahum
So they
REM – prefixed resumption particle fa + PRON – 3rd person masculine plural personal pronoun hum
Root Link: ه م
āthārihim
their footsteps
N – genitive masculine plural noun + PRON – 3rd person masculine plural object pronoun Ha
Root Link: ا ث ر
yuh'raʿūna
they hastened
V – 3rd person masculine plural passive imperfect verb + PRON – subject pronoun na
Root Link: ه ر ع