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

• nitrogenize
• nitrogenous
• nitroglycerin
• nitroglycerine
• nitrohydrochloric acid
• nitrosobacteria
• Nitrosomonas
• Nitrospan
• Nitrostat
• nitrous
• nitrous acid
• nitrous bacteria
• nitrous bacterium
• nitrous oxide
• nitta tree
• nitty
• nitty-gritty
• nitweed
• nitwit
• nitwitted
• NIV
• niveous
• Nivose
• nix
• nixie