6 (Having far off espied a tercel-gentle,
tercel-gentle > male falcon (esp. the peregrine, Falco peregrinus)
7 Which after her his nimble wings does strain), 8 Doubles her haste for fear to be for-hent,
Doubles > [And doubles; the construction is rather awkward without a conjunction here] for-hent > overtaken, seized (the prefix is an intensive and superlative, implying painful effect or overpowering; "hend" = "seize", "lay hold of", "take", "grasp")
9 And with her pinions cleaves the liquid firmament.
liquid > transparent; ethereal; bright
304.50
With no lesse haste, and eke with no lesse dreed,
2 That fearefull Ladie fled from him, that ment
To her no euill thought, nor euill deed;
4 Yet former feare of being fowly shent,
Carried her forward with her first intent:
6 And though oft looking backward, well she vewd,
Her selfe freed from that foster insolent,
8 And that it was a knight, which now her sewd,
Yet she no lesse the knight feard, then that villein rude.
1 With no less haste, and eke with no less dread,
eke > also