perennial

Từ điển American Heritage Dictionary 4th

per·en·ni·al (pə-rĕnʹē-əl)adj.
1. Lasting or active through the year or through many years.
2.
a. Lasting an indefinitely long time; enduring:
perennial happiness.
b. Appearing again and again; recurrent. See Synonyms at continual.
3. Botany. Living three or more years.n.
1. Botany. A perennial plant.
2. Something that recurs or seems to recur on a yearly or continual basis: “that hardy perennial, the budget deficit” (David S. Broder).  [Latin perennis(per-, throughout; see per- + annus, year; See at- in Indo-European Roots) + -al¹.] per·enʹni·al·ly adv.

• Từ đồng nghĩa / Synonyms:
  recurrent, repeated
• Từ trái nghĩa / Antonyms:
  annual, one-year, biennial, two-year