A term for the domesticated rice plant, pre-reconstructable as #am, occurs in three modern languages belonging to phylogenetically distant subgroups of Tibeto-Burman (TB) (note: by ‘Tibeto-Burman’ I mean a branch of the Sino-Tibetan family which includes all its languages except Chinese. There is evidence that Tibetan and Burmese are part of the same eastern subbranch of that subgroup: thus the name ‘Tibeto-Burman’ is over-restrictive, and a new name will eventually have to be found).
|Bengni (Tani group)||am||‘rice plant’||Sun (1993)|
|Dulong (a.k.a Trung, Nungish group)||am55||‘rice’ (paddy)||Huang et al. (1992)
|Sak (Sal group)||aŋ||‘rice plant’||Huziwara (2008)|
Final *-m regularly shifts to -ŋ in Sak.
Apparently related forms occur in other TB languages. Chepang (Caughley 2000) ʔamʰ ‘cooked rice’ and yam ‘rice plant’ (these two forms are related to one another, compare Chepang ʔat and yat, both ‘one’). Jingpo, another Sal language, has #am apparently prefixed with m- of uncertain function: mam³³ ‘rice’ (paddy). Likewise, the Kiranti language Thulung (Allen 1975) has mam ‘grain of rice remaining unhusked after milling’.
Allen, N.J. 1975. Sketch of Thulung grammar. (East Asian Papers, No. 6). Ithaca: Cornell University China-Japan Program. Accessed via STEDT database <http://stedt.berkeley.edu/search/> on 2018-02-09.
Caughley, R. (2000) Dictionary of Chepang. Canberra: Pacific Linguistics 502.
Huang Bufan et al. 1992. Zang-Mian Yuzu Yuyan Cihui [A Tibeto-Burman Lexicon]. Beijing: Zhongyang Minzu Xueyuan Chubanshe.
Huziwara Keisuke. 2008. Chakku-go no kijutsu gengogakuteki kenkyuu [A descriptive linguistic study of the Sak language]. (unpublished ms. contributed to STEDT). Accessed via STEDT database <http://stedt.berkeley.edu/search/> on 2018-02-09.
Sun, Jackson Tianshin. 1993. Tani synonym sets. (unpublished ms. contributed to STEDT). Accessed via STEDT database <http://stedt.berkeley.edu/search/> on 2018-02-09.