perpetual

Từ điển American Heritage Dictionary 4th

per·pet·u·al (pər-pĕchʹo͞o-əl)adj.
1. Lasting for eternity.
2. Continuing or lasting for an indefinitely long time.
3. Instituted to be in effect or have tenure for an unlimited duration:
a treaty of perpetual friendship.
4. Continuing without interruption. See Synonyms at continual.
5. Flowering throughout the growing season. [Middle English perpetuel, from Old French, from Latin perpetuālis, from perpetuus, continuous : per-, per- + petere, to go toward; See pet- in Indo-European Roots.] per·petʹu·al·ly adv.

• Từ đồng nghĩa / Synonyms:
  ceaseless, constant, incessant, never-ending, unceasing, unremitting, ageless, aeonian, eonian, eternal, everlasting, unending