1. Not yet used or soiled
   "an unused envelope"
   - fresh 
2. Not yet put into use
   "we bought an unused car for a change" 
3. Not in active use
   - idle 
4. Infrequently exposed to
   "feet unused to shoes"

See also: clean, inactive, new, unaccustomed

• catchword
• catchy
• catclaw
• cate
• catechesis
• catechetic
• catechetical
• catechetical instruction
• calumniatory
• calumnious
• calumniously
• calumny
• Calvados
• calvaria
• calvary
• Calvary clover
• Calvary cross
• Calvatia
• Calvatia gigantea
• calve
• Calvert Vaux
• calves' feet
• calves' liver
• Calvin
• Calvin Coolidge