0 Old HSK word(s):

必要性 * *

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

必 surely, most certainly / must

要 necessary, essential / necessity

性 nature, character, sex

Hsk Characters:

HSK -Characters and beyond:

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Notwendigkeit (S) [bi4 yao4 xing4]

必要性