0 Old HSK word(s):
不三不四* *

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

不 no, not / un- / negative prefix
三 three
不 no, not / un- / negative prefix
四 four
Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual




zweifelhaft (Adj) [bu4 san1 bu4 si4] 不三不四