per·en·ni·al
/pəˈrenēəl/
adjective
lasting or existing for a long or apparently infinite time; enduring or continually recurring.
"his perennial distrust of the media"
synonyms: everlasting, perpetual, eternal, continuing, unending, never-ending, endless, undying, ceaseless, abiding, enduring, lasting, persisting, permanent, constant, continual, unfailing, unchanging, never-changing
noun
a perennial plant.
"perennials will transform the garden in summer"
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