The term BE UNCERTAIN can be described by the crossword solutions of DOUBT (5 letters), WAVER (5 letters), HESITATE (8 letters), DITHER (6 letters), and FALTER (6 letters). All of these words refer to a state of being unsure or indecisive. DOUBT implies a lack of certainty, WAVER suggests wavering between two decisions, HESITATE implies hesitation in making a decision, DITHER implies being in a state of confusion, and FALTER implies a lack of confidence.