0 Old HSK word(s):
阳一套,阴一套* *

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

阳 'male' principle / light / sun
一 one / a, an / alone
套 case, cover, wrapper, envelope

Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual