grumpyadj (grumpier, grumpiest)

• unadventurous
• unadvised
• unaffected
• unaffiliated
• unaffordable
• unaided
• unalienable
• unaligned
• unalloyed
• unalterable
• unambiguous
• un-American
• unanimous
• unannounced
• unanswerable
• unappealing
• unappetizing
• unapproachable
• unapt
• unarmed
• unashamed
• unasked
• unassailable
• unassertive
• unassisted