nonessential

noun

anything that is not essential
必須でないもの
- they discarded all their inessentials
  彼らは要らないものは全部捨てた

adjective

not of prime or central importance
最も、または非常に重要というわけではない
- nonessential to the integral meanings of poetry- Pubs.MLA
  詩の全体の意味には必要ない−パブス・MLA

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