6 It were to abandon noble chevisance

chevisance > enterprise, knightly enterprise (catachr.)

7 For show of peril, without venturing: 8 Rather let try extremities of chance 9 Than enterprised praise for dread to disadvance."

enterprised > [an already] undertaken praise > {Object of praise, praiseworthy deed} for > [through, because of] disadvance > check the advance of; draw back; hence: revoke

311.25

Therewith resolu'd to proue her vtmost might,
2 Her ample shield she threw before her face,
And her swords point directing forward right,
4 Assayld the flame, the which eftsoones gaue place,
And did it selfe diuide with equall space,
6 That through she passed; as a thunder bolt
+Perceth+ the yielding ayre, and doth displace
8 The soring cloudes into sad showres ymolt;
So to her yold the flames, and did their force reuolt.

7 Perceth > Pearceth 1609

1 Therewith resolved to prove her utmost might,

Therewith > With that, thereupon prove > try; demonstrate

2 Her ample shield she threw before her face