必 不 可 少 bì bù kě shǎo : absolutely necessary; indispensable; essential
必 要 bì yào : necessary; essential; indispensable; required
不 必 要 bú bì yào : needless; unnecessary
須 [须] xū : beard; necessary; must
Big5: , Unicode: 9808  (須), 
Links: MT, Cantonese, Ld, Chinese Language
贅 述 zhuì shù : to say more than is necessary
Zhendic searched cessary as en in 0 s. 
 
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Ressources : Unihan database, Guoyu Cidian, Lindict
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