3. base: dark.

4. brav'ry: splendor. rotten smoke: foul vapors.

8. disgrace: i.e., the emotional wound of being mistreated by his beloved; the "loss" referred to in line 10.

9. shame: remorse.  give physic to: serve as medicine for; drive out.

12. cross: affliction.

13. sheeds: sheds.

14. ransom: compensate for.