របាទ

Noun

 * 1) The diacritical mark, which indicates an orthographic ‘r’ (repha) in some words borrowed from Sanskrit (in Devanagari, repha appears as the eyelash mark above क|र्क, or rka). It originally represented an /r/ sound that preceded the base consonant, but in Khmer, in most cases, the consonant above which it appears, and the diacritic itself, are not pronounced.​ Instead, an "oa" sound is produced.
 * ​ = dharma (pronounced like "thoa", whereas ធ by itself would have been pronounced "tho", and ធម would have been pronounced "thom")