Proto-Sino-Tibetan: *thɨam
Meaning: cover, put over
Tibetan: gtum to veil, cover; wrap up (e.g. the head), thum(s) cover, covering, wrapper, ãthum (p. ãthums, f. btum(s ), i. ãthum, btum) to cover or lay over, put over; to coat.
Lushai: tuam to wrap, wrap round, to bind.