The term 'be undecided' can be described by the crossword solutions of 'HANG', 'WAVER', 'PEND', 'hangfire', 'FENCE', 'FALTER', and 'sitonthefence'. To 'HANG' is to suspend something from a support, while to 'WAVER' is to move back and forth or to be uncertain. To 'PEND' is to remain undecided or unresolved, and 'hangfire' is an expression used to describe a delay in the resolution of a situation. To 'FENCE' is to avoid making a decision, and to 'FALTER' is to hesitate or WAVER in purpose or action. Finally, 'sitonthefence' is an idiom used to describe someone who is unwilling to take sides or make a decision.