The term 'REMAIN UNRESOLVED' can be expressed in three different ways: PEND (4 letters), HANGFIRE (8 letters), and STILLUPINTHEAIR (15 letters). PEND means to be undecided or unresolved, while HANGFIRE is an idiom meaning to wait for a decision or resolution. STILLUPINTHEAIR is another idiom which means that the outcome of a situation is still uncertain. All three terms refer to a situation that has not been resolved and remains in limbo.