sexennial

sex·en·ni·al

S0300600 (sĕk-sĕn′ē-əl)adj.1. Occurring every six years.2. Relating to or lasting six years.n. An event that occurs every six years.
[From Latin sexennium, of six years : sex, six; see sex- + annus, year; see at- in Indo-European roots.]
sex·en′ni·al·ly adv.

sexennial

(sɛkˈsɛnɪəl) adjoccurring once every six years or over a period of six yearsna sixth anniversary[C17: from Latin sexennis of six years, from sex six + annus a year] sexˈennially adv
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