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

See also: extemporarily, unprepared

• 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
• upsetter
• upsetting