0 Old HSK word(s):
无动于衷/中* *

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

无 negative, no, not / KangXi radical 71
动 move, happen / movement, action
于 in, on, at / go to / surname
衷 heart, from bottom of one's heart
Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual