2 Old HSK word(s): 
☊必然 ** B ☊不免 ** C
Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.
不 no, not / un- / negative prefix
免 spare / excuse from / evade
Hsk Characters:
HSK -Characters and beyond:
| Gb | Big5 | Eng | Rad | Mega | Triple | Multilingual |
|---|
|
Essentials (S)Not (S)Notwendigkeit (S)Unentbehrlichkeit (S)Unerlässlichkeit (S)unerlässlich (Adj)unvermeidbar (Adj) [bu4 ke3 que1 shao3] 
不可缺少
Not (S)Unvermeidbarkeit (S)unentrinnbar (Adj)unvermeidbar (Adj)unvermeidlich (Adj)zwangsläufig (Adj) [bu4 ke3 bi4 mian3] 不可避免
unvermeidbar, unvermeidlich (Adj) [mian3 bu5 liao3] 免不了
vermeidbar [ke3 fang2 zhi3] 可防止
vermeidbar (Adj) [ke3 bi4 mian3] 可避免
vermeidbar, vermeidlich (Adj) [ke3 gui1 bi4] 可规避
