1. In a mildly insane manner
   - daftly, dottily, balmily, nuttily

See also: wacky

• upbound
• upbraid
• upbraider
• upbraiding
• upbringing
• upcast
• upchuck
• upcoming
• upcountry
• upcurved
• update
• updating
• updation
• Updike
• updraft
• upend
• upended
• upending
• upfield
• upfront
• upgradation
• upgrade
• upgrowth
• upheaval
• upheave