nonessentiality

non-

Used in the sense of no or none, to show lack of or failure to perform; or in the sense of not, to negate the meaning of the word to which it is prefixed.

也可拆解为

-ity

Used to form an uncountable noun from an adjective; especially, to form the noun referring to the state, property, or quality of conforming to the adjective's description. · Used to form a countable noun from an adjective, referring to someone or something that conforms to the adjective's description.