1. In an alarming manner
   "It grew alarmingly fast"

See also: alarming

• upchuck
• upcoming
• upcountry
• upcurved
• update
• updating
• updation
• Updike
• updraft
• upend
• upended
• upending
• upfield
• upfront
• upgradation
• upgrade
• upgrowth
• upheaval
• upheave
• uphill
• uphold
• upholder
• upholster
• upholsterer
• upholstery