1. Everlastingly; for all time
   "rays...streaming perpetually from the sun" 
2. Without interruption
   - constantly, always, forever, incessantly, unremittingly

See also: perpetual

• deceiver
• deceivingly
• decelerate
• deceleration
• December
• December 31
• December 8
• decemvir
• decency
• decennary
• decennial
• decennium
• decent
• decentalisation
• decently
• decentralisation
• decentralise
• decentralised
• decentralising
• decentralization
• decentralize
• decentralized
• decentralizing
• deception
• deceptive