triennial的词源

英文词源

triennial (adj.)

1630s, "lasting three years;" 1640s, "occurring every three years," with -al (1) + Latin triennium "three-year period," from tri- "three" (see tri-) + annus "year" (see annual). For vowel change, see biennial. As a noun, 1630s. Related: Triennially.

中文词源

triennial：每三年一次的

tri-, 三，-enn,年，词源同 annual,biennial.

该词的英语词源请访问找单词词源英文版：triennial 词源，triennial 含义。