The word "Cachat" is spelled with a "ch" sound followed by the letter "a" and the letters "c-a-t." The "ch" sound is represented by the IPA phonetic symbol /tʃ/. This sound is a combination of a "t" and "sh" sound, which is commonly found in English words such as "church" and "cheese." The remaining letters in "Cachat" are pronounced as they appear, with the "a" sound represented by the IPA symbol /a/ and the "c" and "t" sounds represented by /k/ and /t/, respectively.
See Evian-les-Bains.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.