Unnecessary

adj. excessive, redundant, superfluous

"NECESSARY" was the tenth single by the Japanese j-pop group Every Little Thing, released on September 30, 1998.
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Necessary may refer to:Something that is a required condition for something else to be the case, see necessary and sufficient conditionsA necessary truth, something that cannot fail to be true, see logical possibilityan important task or essential thing to do at a particular time or by a particular time
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Adjective
1. not necessary
(synonym) unneeded
(antonym) necessary
(similar) excess, extra, redundant, spare, supererogatory, superfluous, supernumerary, surplus
(see-also) inessential, unessential
(attribute) necessity

sha1 ji1 yan1 yong4 niu2 dao1
Why use and ox-cleaver to kill a chicken?
Performing a minor feat with unnecessary great effort. Why break a butterfly on the wheel? Using a steam-hammer to crack nuts. Alternative form: 割鸡焉用牛刀 (ge1 ji1 yan1 yong4 niu2 dao1).

hua4 she2 tian1 zu2
Draw a snake with feet.
A figure of speech to describe adding something that does not exist or to do something redundantly. Wasting time on something superfluous. Compare with 画龙点睛 (hua4 long2 dian3 jing1).

adj.
فضول, غير ضروري, برتھا, بيکار