Reconstruction:Proto-Sino-Tibetan/s-r(j)ak

Etymology

 * Proto-Sino-Tibetan: *riak/rjiak (Coblin, 1986)
 * Proto-Tibeto-Burman: *s-r(y)ak (Matisoff, STEDT); *ryak (Benedict, 1972)

Schuessler (2007) assigned Chinese to →  instead. Benedict (1972) listed Chinese as a reflex of this root, but the initials and vowels are difficult to reconcile.

Noun

 * 1) night
 * 2) day (24 hours)
 * 3) to spend the night, overnight

Descendants

 * Old Chinese:
 * Middle Chinese:


 * Modern Mandarin
 * Beijing: ,
 * Kamarupan
 * Kuki-Chin
 * (VanBik, 2009)
 * Central Chin
 * Lushai [Mizo]:
 * Himalayish
 * Tibeto-Kanauri
 * Bodic
 * Tibetan
 * Written (>, )
 * Lolo-Burmese-Naxi
 * Lolo-Burmese
 * ("night, spend the night") (Matisoff, 1972)
 * Burmish
 * (Bradley, 1979)
 * Northern Loloish
 * Yi (Liangshan):
 * Central Loloish
 * Lisu (Southern):
 * Lisu (Southern):