Perennial

Part of speech: noun (n.)

A perennial plant; a plant which lives or continues more than two years, whether it retains its leaves in winter or not.

Part of speech: adjective (a.)

1. ing or continuing through the year; as, perennial fountains.

2. Continuing without cessation or intermission; perpetual; unceasing; never failing. The perennial existence of bodies corporate. Burke.

3. Continuing more than two years; as, a perennial steam, or root, or plant.

Synonyms: Perpetual; unceasing; never failing; enduring; continual; permanent; uninterrupted.