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triennial

adjective

/traɪˈɛniəl/

Meaning

Occurring once every three years.

The art festival is a triennial event in the city.

three-yearly, periodic, recurring

annual, monthly

triennial event, triennial report, triennial gathering

Negligent in performing a duty or responsibility.

never changing; constant; always the same

Having different colors, especially in irregular patches or streaks.

extremely good; wonderful; excellent

Living the life of a nomad; wandering without a permanent home.

requiring skill or careful handling; difficult to deal with