having or showing a general lack of knowledge or of education in things in general
I do not pretend to know where many ignorant men are sure — Clarence Darrow
(often + of) uninformed about or unaware of a specified subject, etc
Being ignorant of the law is no excuse
chiefly informal lacking social training; impolite
ignorance noun
ignorantly adv
[Middle English via Old French from Latin ignorant-, ignorans, present part. of ignorare: ignore]