1. Free of ice and open to travel
   "an ice-free channel in the river"

See also: unfrozen

• Uppsala
• upraise
• upraised
• uprate
• uprear
• upright
• upright piano
• uprightly
• uprightness
• uprise
• uprising
• upriver
• uproar
• uproarious
• uproariously
• uproot
• uprooter
• uprush
• ups and downs
• ups-a-daisy
• Upsala
• upscale
• upset
• upset price
• upset stomach