simple past tense and past participle of unresolve
"The committee had to adjourn because they could not find a way to unresolve the conflicting votes from last week's meeting."
In plain English: To leave something unresolved means to fail to solve it or finish dealing with an issue so that problems remain unsolved.
"The team hopes to resolve all their technical issues by next week so they are not left unresolved at launch time."
not brought to a conclusion; subject to further thought
"an open question"
"our position on this bill is still undecided"
"our lawsuit is still undetermined"
characterized by musical dissonance; harmonically unresolved
"The composer deliberately left the final chord unresolved to create a sense of lingering tension throughout the piece."
Not resolved.
"The unresolved issues between the two companies caused a delay in signing the contract."
The word unresolved comes from adding the prefix un- to resolved. It entered English as a straightforward negation of having reached a conclusion or decision.