say it: nah-ni-SEN-shuhl
nonessential is a noun and adjective meaning "anything that is not essential". It carries 2 recorded senses.
anything that is not essential
“they discarded all their inessentials”
not of prime or central importance
“nonessential to the integral meanings of poetry”
“the character's motives remain accidental to the plot”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for nonessential come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.