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

See also: continuous, uninterrupted

• federal tax lien
• Federal Trade Commission
• federalisation
• federalise
• federalism
• federalist
• Federalist Party
• federalization
• federalize
• federally
• federate
• federated
• Federated States of Micronesia
• federation
• Federation of Saint Kitts and Nevis
• federation of tribes
• federative
• Federative Republic of Brazil
• Federico Fellini
• federita
• fedora
• fee
• fee simple
• fee splitting
• fee-tail