1. Flawlessly
   "the film was impeccably authentic"

See also: impeccable

• democratise
• democratization
• democratize
• Democritus
• demodulate
• demodulation
• demodulator
• Demogorgon
• demographer
• demographic
• demographist
• demography
• demoiselle
• demolish
• demolished
• demolishing
• demolition
• demon
• demon-ridden
• demonetisation
• demonetise
• demonetization
• demonetize
• demoniac
• demoniacal