2 Where him that witch had thralled to her will,

thralled > enslaved, made a captive

3 In chains of lust and lewd desires bound, 4 And so transformed from his former skill

skill > reason, power of discrimination; knowledge

5 That me he knew not, neither his own ill;

neither > [neither did he know] ill > distress; wickedness

6 Till, through wise handling and fair governance,

handling > treatment governance > governing, management; self-control

7 I him recured to a better will,

recured > restored