0 Old HSK word(s):
小心眼儿* *

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

小 small, tiny, insignificant
心 heart / mind, intelligence / soul
眼 eye / eyelet, hole, opening
儿 son, child / KangXi radical 10
Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual