0 Old HSK word(s):
悔不该* *

Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.

悔 repent, show remorse, regret
不 no, not / un- / negative prefix
该 should, ought to, need to

Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual