nonessential

Từ điển WordNet v3.1 - WordNet Dictionary

I - noun

anything that is not essential
- they discarded all their inessentials
• Syn:
inessential
• Ant:
essential (for: inessential)
• Hypernyms:
thing
• Hyponyms:
adjunct

II - adjective

not of prime or central importance
- "nonessential to the integral meanings of poetry"- Pubs.MLA
• Syn:
incidental
• Similar to:
inessential, unessential