IPA: /kwɪŋˈkwɛn.i.əl/
KK: /kwɪŋˈkwɛn.i.əl/
Something that happens or is done every five years.
The quinquennial festival attracts visitors from all over the country.
An event that happens every five years, or a celebration marking the fifth anniversary of something.
The city held a quinquennial celebration to mark its 50th anniversary.
Quinquennial → It is formed from "quinque" (meaning five) and "annus" (meaning year). The word "quinquennial" refers to an event that occurs every five years.
Think of 'five' ('quinque') and 'year' ('annus') to remember that 'quinquennial' means something that happens every five years.
No commonly confused words.