English edit

Etymology edit

treble +‎ -ly

Adjective edit

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

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

Adverb edit

trebly (not comparable)

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

Synonyms edit