[pe.ren.nate] vi -nat.ed ; -nat.ing [L perennatus, pp. of perennare, fr. perennis] (ca. 1623): to live over from season to season "a perennating rhizome" -- per.en.na.tion n
PERENNATE
Meaning of PERENNATE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012