Proto-Sino-Tibetan: *pērH
Meaning: flat
Burmese: pjań plank, flat surface (OB pjan).
Kachin: phjen2 be spread out and thus flat, (H) bjen be flat and wide.
Lushai: pēr (perʔ) flat and thin, KC *Pēr.
Comments: Kham pǝlē flat (as a board); Dimasa gepher flat. Sh. 49; Ben. 73; Luce 63.