Proto-Sino-Tibetan: *[c]ɨ̄ŋ
Meaning: increase, abundant
Tibetan: ãcheŋ to increase, improve, thrive.
Kachin: soŋ3 be abundant, plentious.
Lushai: čuaŋ (čuan) spare, extra, surplus, more.
Comments: Cf. also Serdukpen ieb-chaŋ, Chang chūŋ, Naga *cVŋ 'many'. Cf. PAN *unzan 'add to, increase'.