This is the 1854th most frequent Japanese word.
未
"未" means "not yet" or "un-".
'未' (mi) is used here to denote '未完成' (mikansei), meaning 'incomplete', representing something not yet finished.
未完成のプロジェクトがあります。
There is an incomplete project.
'未' (mi) in '未公開' (mikoukai) signifies 'not yet released', used to describe something that hasn't been made public yet.
その映画はまだ未公開です。
That movie is still unreleased.
'未' (mi) is part of the phrase '未だに' (imadani), meaning 'still', indicating a state that persists to the present.