From ល្ហ (lhɑɑ, “wide, spacious, cleared”) with infixed -VN- (locative). <span class="searchmatch">លំហ</span> • (lumhɑɑ) wide open space, expanse...
ល្ហ • (lhɑɑ) (abstract noun ភាពល្ហ) to be wide, open, deserted, empty, deserted, cleared, passable (as a road) <span class="searchmatch">លំហ</span> (lumhɑɑ)...