Not trying to be "that guy", just figured you might want to know-- although it's pronounced "tamber" it's spelled "timbre". Thanks, english.
Another thing that happens is that both English and French change their pronunciation over time. After English imports a word, the French pronunciation may change making the English word look odd or not even look connected. Not sure that this happened to “timbre” but it did happen to words like “chief” and “chef”. Both were imported from French but at different times. “Chief” when French used the hard ‘ch’ sound and “chef” when French had switched to the soft ‘sh’ sound.
https://www.merriam-webster.com/dictionary/timbre https://en.wiktionary.org/wiki/Timbre