Merriam-Webster Collegiate Dictionary - perpetual

 adjective  Etymology: Middle English perpetuel, from Anglo-French, from Latin perpetuus uninterrupted, from per- through + petere to go to — more at feather  Date: 14th century  1.  a. continuing forever ; everlasting ~ motion  b.  (1) valid for all time a ~ right  (2) holding (as an office) for life or for an unlimited time  2. occurring continually ; indefinitely long-continued ~ problems  3. blooming continuously throughout the season  Synonyms: see continual  • ~ly adverb