1. Uninterrupted in time and indefinitely long continuing
   "the never-ending search for happiness"
   - ceaseless, constant, incessant, perpetual, unceasing, unremitting

See also: continuous, uninterrupted

• unneurotic
• unnilquadium
• unnotched
• unnoted
• unnoticeable
• unnoticeableness
• unnoticeably
• unnoticed
• unnourished
• unnumberable
• unnumbered
• unnumerable
• unobjectionable
• unobjective
• unobligated
• unobliging
• unobservable
• unobservant
• unobserved
• unobserved fire
• unobstructed
• unobtainable
• unobtrusive
• unobtrusively
• unobtrusiveness