ɲaːp⁸ from Proto-Mon-Khmer *sʔaap (“to yawn”). Cognate with Vietnamese ngáp, Bahnar kơngap, Pacoh ng-ap, Khmer ស្ងាប (sngaap), Mon ဒအာပ် (həap), Central Nicobarese hing-âp.
ʔɔː¹ ɲaːp⁸
