"Irresolved" is a word that denotes a lack of resolution or closure. It is often used to describe an issue or problem that remains unresolved despite efforts to resolve it. There are several synonyms that can be used in place of "irresolved," such as unresolved, unsettled, pending, outstanding, and open. These words convey a similar sense of an issue that has not been fully resolved or that remains unresolved. Other synonyms for "irresolved" include unfinished, inconclusive, and undetermined, as well as words like uncertain, ambiguous, and vague, which suggest a lack of clarity or definition around the issue or problem in question.