From ដាស់ (dah, “to wake someone up”) with infixed -VN- (processive). <span class="searchmatch">ដំណាស់</span> • (dɑmnah) awakening (of someone)...
Wiktionary by elaborating on the origins of this term. ដាស់ • (dah) (abstract noun ការដាស់) to wake someone up <span class="searchmatch">ដំណាស់</span> (dɑmnah) តើន (taən) ភ្ញាក់ (phñĕək)...