1. With little or no preparation or forethought
   "a few unrehearsed comments"
   - ad-lib, extemporaneous, extemporary, extempore, impromptu, offhand, offhanded, off-the-cuff

See also: unprepared

• colourlessness
• colours
• colpitis
• colpocele
• colpocystitis
• colpocystocele
• colportage
• colporteur
• colposcope
• colposcopy
• colpoxerosis
• colt
• coltan
• colter
• coltish
• coltsfoot
• Coluber
• Coluber constrictor
• Coluber constrictor flaviventris
• Coluber hippocrepis
• colubrid
• colubrid snake
• Colubridae
• Colubrina
• colubrine