NONESSENTIAL
incidental, nonessential, accidental
(adjective) not of prime or central importance; “nonessential to the integral meanings of poetry”- Pubs.MLA; “the character’s motives remain accidental to the plot”
inessential, nonessential
(noun) anything that is not essential; “they discarded all their inessentials”
Source: WordNet® 3.1
Etymology
Adjective
nonessential (not comparable)
Not required; not essential.
Antonyms
• essential
• required
• necessary
• mandatory
Noun
nonessential (plural nonessentials)
Something that is not essential.
Source: Wiktionary
Non`es*sen"tial, a.
Definition: Not essential.
Non`es*sen"tial, n.
Definition: A thing not essential.
Source: Webster’s Unabridged Dictionary 1913 Edition