Proto-Sino-Tibetan: *ćǝ̆H
Meaning: make
Tibetan: ãćha (p. bćas, ãćhas, f. bća, i. ćhos) to make, prepare.
Kachin: (H) ča to pile or lay, as stones; to build, as stone-wall, to build, as scaffold; mǝča2 a watch-tower in a paddy field.
Lushai: ? sa (sak) to build or erect (as house etc.).
Comments: Coblin 148 compares OCh. 事 and Tib. rʒas thing, matter, object.