ETYMOLOGY
from Latin nescius (ignorant, not knowing),
from nescire (to be ignorant, not to know) + -ous
EXAMPLE
“… The third cause of the decay of Trade, in Malynes accompt, are Litigious Law-suits. To the Efficiency whereof, Malynes cannot altogether agree, but rather to the Remedie. But I shall willingly pardon him that: for he that is so ignorant in the Essentiall causes, must needs be nescious in the Efficients also. I would there were no cause, for their sakes whose case it is, to dispute this Causalitie. …”
From: The Circle of Commerce.
Or The ballance of trade in defence of free trade: opposed to Malynes little fish and his great whale, and poized against them in the scale.
By Edward Misselden, 1623
Lexicophilia 