per·pet·u·al 
(pər-pĕch-əl)
(pər-pĕch-əl)adj.
1. Lasting forever; never-ending: conceived heaven as a state of perpetual bliss.
2. Continuing or being so for an indefinitely long time: found themselves in perpetual debt; felt like a perpetual outsider. See Synonyms at continual.
3. 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 the Appendix of Indo-European roots.]
per·petu·al·ly adv.