lightfoot > light-footed
2 And, sitting down upon the rocky shore, 3 Bade her old squire unlace her lofty crest;
squire > attendant [Glauce] crest > helmet
4 Tho, having viewed awhile the surges hoar,
Tho > Then, next hoar > grey-white, hence: foamy (cf. 212.10:3)
5 That gainst the craggy cliffs did loudly roar,
gainst > against
6 And in their raging surquidry disdained
surquidry > arrogance disdained > took offence
7 That the fast earth affronted them so sore