8 Down in a dungeon deep he let her fall, 9 And threatened there to make her his eternal thrall.

thrall > slave

308.42

Eternall thraldome was to her more liefe,
2 Then losse of chastitie, or chaunge of loue:
Die had she rather in tormenting griefe,
4 Then any should of falsenesse her reproue,
Or loosenesse, that she lightly did remoue.
6 Most vertuous virgin, glory be thy meed,
And crowne of heauenly praise with Saints aboue,
8 Where most sweet hymmes of this thy famous deed
Are still emongst them song, that far my rymes exceed.

1 Eternal thraldom was to her more lief

thraldom > captivity, slavery lief > agreeable, acceptable

2 Than loss of chastity, or change of love: 3 Die had she rather in tormenting grief

Die had she rather > [She would rather have died]

4 Than any should of falseness her reprove,

Than > [Than that] reprove > condemn