OLD-TIMER

old-timer:
- a person who has been an employee, member, soldier or resident for a long time
- an old-fashioned person
- oldster
- veteran

EXPOUND

expound:
- to set forth in detail; to state in detail
- to explain, interpret, clarify or defend by setting forth in careful and often elaborate detail

ABSTAIN

abstain:
to refrain deliberately and often with an effort of self-denial from something regarded as improper or unhealthy (Example: He abstains from eating meat.)

REMORSE

remorse:
a gnawing distress for wrongdoing; compunction; self-reproach