Perennial

a. [Lat. perennis, that lasts the whole year through, fr. the prefix per, through, and annus, year; O. Fr. pérenne, It. perenne, Sp. perenne, perennal.]

1. Lasting or continuing without cessation through the year.
2. Hence, continuing without stop or intermission; perpetual; unceasing; never failing.

The perennial existence of bodies corporate, and their fortunes, are things particularly suited to a man who has long views. Burke. 3. (Bot.) Continuing more than two years; as, a perennial stem or root. Martyn. Syn.—Perpetual; unceasing; never-failing; unfailing; ceaseless; constant; enduring; permanent; uninterrupted; continual.