ADJ.
different, difficult, worthless
VERB + TREBLY
made, save, sounded, voice
TREBLY + NOUN
jim, life
PREP.
off
adj
Having treble, or high-pitched, qualities.
With the room so bare, Ivret’s voice sounded different, trebly echoes ringing off her sibilants.
adv
Three times, thrice
To three times the extent or degree; triply.
For my part, I must do my best to save this fellow's trebly worthless life; Jim, you get me a basin.
The task was made trebly difficult, however, by the badly run-down condition in which the railways of Britain had been unavoidably left at the end of the war in 1945, […].
With the room so bare, Ivret’s voice sounded different, trebly echoes ringing off her sibilants.
WiktionaryFor my part, I must do my best to save this fellow's trebly worthless life; Jim, you get me a basin.
WiktionaryThe task was made trebly difficult, however, by the badly run-down condition in which the railways of Britain had been unavoidably left at the end of the war in 1945, […].
Wiktionaryi Register
In some senses, trebly is marked as archaic. Watch for register when choosing this word.