English

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Etymology

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From treble +‎ -ly.

Adjective

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trebly (comparative treblier or more trebly, superlative trebliest or most trebly)

  1. Having treble, or high-pitched, qualities.

Adverb

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trebly (not comparable)

  1. (archaic) Three times, thrice
  2. To three times the extent or degree; triply.

Synonyms

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Note 1