Proto-Sino-Tibetan: *pāk
Meaning: wide, long, ample
Tibetan: ãphag (p. ãphags) to rise, be raised; to grow longer, bigger.
Burmese: paŋʔ to lift, raise.
Lushai: KC *pāk- (?).
Comments: Thankur pak be broad, Bodo bo to stretch, spread. Luce 74. Cf. PAN *labak, *labeqak, *laqebak 'wide, open'.