trebling

Verb

treble (third-person singular simple present trebles, present participle trebling, simple past and past participle trebled)

1. (dated, transitive) To multiply by three; to make into three parts, layers, or thrice the amount.
   • There is increasing evidence that cannabis use can act as a risk factor for the development of bipolar as well as psychotic disorders. A recent systematic review by Gibbs and colleagues identified several studies supporting a link between cannabis use and subsequent relapse of manic symptoms. This...2018 April 26, Tobias A Rowland, Steven Marwaha, “Epidemiology and risk factors for bipolar disorder”, in Therapeutic Advances in Psychopharmacology, volume 8, number 9, →DOI, pages 251–269

   Synonyms:

   triple

2. (dated, intransitive) To become multiplied by three or increased threefold.
   • I am more ſerious then my cuſtome; you
     Muſt be ſo too, if heed me: which to do
     Trebbles thee o're.1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published...
3. (intransitive) To make a shrill or high-pitched noise.

   Synonyms:

   keen, screech, shrill

4. (transitive) To utter in a treble key; to whine.
   • He outrageously / (When I accused him) trebled his reply.1618, George Chapman, A Hymn to Hermes

See all 16 meanings of treble