0 Old HSK word(s):
任意性* *

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

任 trust to, rely on, appoint / to bear, duty, office / allow
意 thought, idea, opinion / think
性 nature, character, sex

Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual