triennial
Longman Dictionary of Contemporary English 5++LDOCE 5++tri·en·ni·al /traɪˈeniəl/ adjective TMChappening every three years 三年一次的 → annual
Examples from the Corpus
triennial• At their triennial congress on Sept. 15-21,1990, delegates adopted a new party programme replacing that of 1975.• June 30 would mark the end of the triennial contract cycle that had punctuated labor-management relations in the copper industry since midcentury.• The triennial election for the Senate Presidency took place on Oct. 2.• The Fourth Lateran Council, held at the end of his reign, imposed a triennial twentieth for the same purpose.Origin triennial (1500-1600) Latin triennis, from triennium “three years”, from tri- + annus “year”tri·en·ni·al adjectiveChineseSyllable
every three Corpus happening years
triennial
tri‧en‧ni‧al /traɪˈeniəl/
adjective
tri‧en‧ni‧al /traɪˈeniəl/
adjective Date: 1500-1600
Language: Latin
Origin: triennis, from triennium 'three years', from tri- + annus 'year'
happening every three years ⇨ annual
Language: Latin
Origin: triennis, from triennium 'three years', from tri- + annus 'year'