3 And all the sleights unbosomed in his heart:
sleights > ruses, stratagems
4 He sighed, he sobbed, he swooned, he pardie died,
pardie > assuredly, verily (an oath)
5 And cast himself on ground her fast beside;
fast > closely
6 Tho when again he him bethought to live,
Tho > Then him bethought > contrived; resolved
7 He wept, and wailed, and false laments belied,
belied > misrepresented; lied about (tautological, and thus intensive)