Simple past tense and past participle of triple.(verb)
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Use "tripled" in a sentence
"The upload speed more than tripled from the 2mb service so that was a pleasant surprise. gmusgrave"
"The company said sales rose 20% and operating profit more than tripled from a year earlier."
"Ericsson's third-quarter sales in North America more than tripled from a year earlier, to 12.9 billion kronor from four billion kronor, spurred by growing demand for mobile broadband as well as the recent Nortel acquisition."