Not essential.
1676, Joseph Glanvill, Seasonable Reflections and Discourses, London: R.W. [and] H. Mortlock, p. 92, [I] have a question more to ask you on occasion of what you have told me; and that is, Whether you are to leave every Minister and Church, as soon as any thing is said that is really erroneous, in the lesser and unessential matters?
Void of essence, or real being.
These [gates] past, if any pass, the void profound Of unessential Night receives him next Wide gaping, and with utter loss of being Threatens him,
From un- + essential.
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