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halfhourly

[ haf-ouuhr-lee, -ou-er-, hahf- ]
/ ˈhæfˈaʊər li, -ˈaʊ ər-, ˈhɑf- /
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adjective
occurring every half-hour: a halfhourly interruption.
adverb
at half-hour intervals: The bell rang halfhourly.
QUIZ
QUIZ YOURSELF ON "IS" VS. "ARE"
"Is" it time for a new quiz? "Are" you ready? Then prove your excellent skills on using "is" vs. "are."
Question 1 of 7
IS and ARE are both forms of which verb?

Origin of halfhourly

First recorded in 1800–10; half + hourly
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
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