Perennial

eterno

(continuing without cessation or intermission for several years, or for an undetermined or infinite period — see also perpetual, unceasing)

perenne

(lasting or remaining active throughout the year, or all the time)

perenne

(continuing without cessation or intermission for several years, or for an undetermined or infinite period — see also perpetual, unceasing)

perenne

(of a plant: active throughout the year, or having a life cycle of more than two growing seasons)

perpetuo

(continuing without cessation or intermission for several years, or for an undetermined or infinite period — see also perpetual, unceasing)

ricorrente

(appearing or recurring again and again — see also recurrent)