verb (used without object), per·en·nat·ed, per·en·nat·ing. Botany.
to survive from season to season for an indefinite number of years.
Origin of perennate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(intr) (of plants) to live from one growing season to another, usually with a period of reduced activity between seasons
Word Origin for perennate
C17: from Latin perennātus, from perennāre, from per- (through) + annus year
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012