wal-shamsi
By the sun
P – prefixed preposition wa (oath) + DET – determiner prefix al + N – genitive feminine noun
Root Link: ش م س
waḍuḥāhā
and its brightness
CONJ – prefixed conjunction wa (and) + N – genitive masculine noun + PRON – 3rd person feminine singular object pronoun hā
Root Link: ض ح و