1. A whim 
2. A whimsical thing; an odd device; a trifle; a trinket

Derived forms: whim-whams

• unpleasantly
• unpleasantness
• unpleasing
• unpleasingness
• unpledged
• unploughed
• unplowed
• unplug
• unplumbed
• unpointed
• unpointedness
• unpolished
• unpolitical
• unpolled
• unpolluted
• unpompous
• unpopular
• unpopularity
• unpopulated
• unportable
• unposed
• unpotted
• unpowered
• unpractical
• unpracticed