Word Study
trebly
CIDE DICTIONARY
trebly, adv.
In a treble manner; with a threefold number or quantity; triply. Swift. [1913 Webster]
ROGET THESAURUS
trebly
Triplication
N triplication, triplicity, trebleness, trine, treble, triple, tern, ternary, triplicate, threefold, trilogistic, third, trinal, trine, three times, three fold, thrice, in the third place, thirdly, trebly.For further exploring for "trebly" in Webster Dictionary Online