quinquennial
英 [kwɪŋ'kwenɪəl]
美 [kwɪn'kwɛnɪəl]
- adj. 每五年的；持續五年的
- n. 五周年紀念；五年期間；每五年發生一次的事件
英文詞源
- quinquennial (adj.)
- late 15c., "lasting five years," from Latin quinquennis "of five years, celebrated every fifth year," from quinque- "five" (see quinque-) + ending from biennial, etc. Meaning "happening once every five years" attested from c. 1600. As a noun from 1895; earlier quinquennal (1610s).