• adj. 多年生的；常年的；四季不断的；常在的；反复的
• n. 多年生植物

per-,整个的，-enn,年，词源同annual.原义为终年的，终年不凋的，后引申词义多年的，长久的。

perennial (adj.)

1640s, "evergreen," formed in English from Latin perennis "lasting through the year (or years)," from per- "through" (see per) + annus "year" (see annual). Botanical sense of "Remaining alive through a number of years" is attested from 1670s; figurative meaning of "enduring, permanent" is from 1750. Related: Perennially. For vowel change, see biennial. The noun meaning "a perennial plant" is from 1763.

1. A perennial is a plant that lives indefinitely.

多年生植物是指能存活很多年的植物。

来自柯林斯例句

2. the perennial problem of water shortage

缺水这个老问题

来自《权威词典》

3. I wonder at her perennial youthfulness.

我对她青春常驻感到惊讶.

来自《简明英汉词典》

4. There's a perennial shortage of teachers with science qualifications.

有理科教学资格的老师一直都很短缺。

来自辞典例句

5. The novel's central theme is the perennial conflict between men and women.

小说的主题是男人和女人之间永无休止的冲突。

来自辞典例句