1. Without prior preparation
   - extemporaneously, extempore

See also: extemporary

• Nerva
• nerve
• nerve agent
• nerve block anaesthesia
• nerve block anesthesia
• nerve cell
• nerve center
• nerve centre
• nerve compression
• nerve deafness
• nerve end
• nerve ending
• nerve entrapment
• nerve fiber
• nerve fibre
• nerve gas
• nerve growth factor
• nerve impulse
• nerve pathway
• nerve plexus
• nerve tissue
• nerve tract
• nerve-racking
• nerve-wracking
• nerveless