0 Old HSK word(s):
坚信不疑* *

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

坚 hard, strong, firm / resolute
信 trust, believe / letter
不 no, not / un- / negative prefix
疑 doubt, question, suspect
Hsk Characters:
HSK -Characters and beyond:
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