Proto-Sino-Tibetan: *n[ǝ]
Meaning: time or place of, when
Tibetan: na year (?); stage of life, age; when.
Kachin: (H) na, čǝna to extend in time; cf. also na loc. or abl. suffix.
Lushai: niaʔ at the time of; when; -na the place of or where, instrument of or for etc.
