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

• Styrax japonicum
• Styrax obassia
• Styrax texana
• styrene
• Styrofoam
• Styron
• Styx
• suable
• suasible
• suasion
• suasive
• suave
• suavely
• suaveness
• suavity
• sub
• sub judice
• sub-assembly
• sub-interval
• sub-rosa
• sub-Saharan
• Sub-Saharan Africa
• sub-test
• subacid
• subacute