Unfinished
Part of speech: adjective
Definition: not finished, not completed
Example sentence: I believe that the rights of women and girls is the unfinished business of the 21st century.
Undone
Part of speech: verb
Definition: To reverse the effects of an action.
Example sentence: Being a mother is a little like 'Groundhog's Day.' It's getting out of bed and doing the exact same things again and again and yet again - and it's watching it all get undone again and again and yet again. It's humbling, monotonous, mind-numbing, and solitary.