0 Old HSK word(s):
百炼成钢* *

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

百 one hundred / numerous, many
炼 smelt, refine / distill, condense
成 completed, finished, fixed
钢 steel / hard, strong, tough
Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual