4 And sprinkled frost upon his dewy beard:
frost > {The colour of frost: silver, silver-grey}
5 Who when those pitiful outcries he heard
outcries > {Cryings out}
6 Through all the seas so ruefully resound,
ruefully > pitiably
7 His charet swift in haste he thither steered,
charet > chariot
8 Which with a team of scaly phocas bound
phocas bound > harnessed seals ("bound" may also indicate metaphorical bonds, as of duty and obligation)