guiltˈy adjective

1. Justly chargeable
2. Blameworthy, responsible
3. Wicked, criminal
4. Involving, indicating, burdened with, or relating to guilt

guiltˈy-like adverb (Shakespeare)

Guiltily

guilt complex noun

A mental preoccupation with one's (real or imagined) guilt

guilt trip noun (informal)

A prolonged feeling of guilt

guilty party noun

A person, organization, etc that is guilty

guilty of or (Shakespeare) to

1. Having committed (a criminal or injudicious act)
2. To blame for (a happening; archaic)
3. Deserving of (obsolete; Bible)