1) Dangling 2) Debatable 3) Inharmonious 4) Open-ended 5) Still up in the air 6) Undecided 7) Unharmonious 8) Unsettled 9) Unsolved 1) Harmonically unresolved 2) Not brought to a conclusion 3) Not solved 4) Subject to further thought 5) Unsolved 
[adj] - (music) characterized by musical dissonance
adjective characterized by musical dissonance; harmonically unresolved