Answer:
For a more plain (and incorrect) western-accent version, it may be pronounced as TRAWM-play, or TRAUM-play.
The O in "om" in the word sounding like like a combination of the A in "awe" or "saw" and a bit like like the O in "on". For a more authentic French pronunciation then you need to also roll the R (from the "tr") in the back of your throat.