different between triennial vs quadrennial

English

Etymology

From Latin triennium (“three-year period”), from tres (“three”) + annus (“year”); surface analysis tri- +? -ennial.

Pronunciation

• IPA^(key): /t?a???n??l/
• Rhymes: -?n??l

Adjective

triennial (not comparable)

1. Happening every three years.
   • 1774-1781, Thomas Warton, History of English Poetry

     They were constantly summoned to a triennial festival : and the most approved songs delivered at this assembly were ordered to be preserved in the custody of the king's historian or antiquary

2. Lasting for three years.
   • September 13 1621, James Howell. letter to Sir William Saint John

     Triennial Subsidies

Synonyms

• (rare): trieterical

Related terms

• (noun): triennium

Translations

See also

• triennially

Noun

triennial (plural triennials)

1. A third anniversary.
2. A plant that requires three years to complete its life-cycle.

Translations

Related terms

• biennial
• triennium
• triannual

English

Alternative forms

• quadriennial

Etymology

Borrowed from Latin quadriennium (“four-year period”), from quattuor (“four”) + annus (“year”); surface analysis quadr- +? -ennial.

Pronunciation

• (UK) IPA^(key): /?kw??d??n.i.?l/
• (US) IPA^(key): /?kw??d??ni.?l/
• Rhymes: -?d??n??l

Adjective

quadrennial (not comparable)

1. Happening every four years.
   • 1852, Millard Fillmore, State of the Union Address:

     The quadrennial election of Chief Magistrate has passed off with less than the usual excitement.

2. Lasting for four years.

Derived terms

• quadrennially

Related terms

• triennial
• biennial
• perennial
• annual

Noun

quadrennial (plural quadrennials)

1. A four-year period, a quadrennium.