![[xi2]](zip.GIF)
xi2 < MC zip < OC *[zl@p] (*zlj+p) 'to do repeatedly'
Jäschke
ldab-pa, pf. bldabs, fut bldab, imp. ldob
- 1. Cs. to do again, to repeat; ... [p. 290]
Here ldab represents pre-Tibetan *'lap.
slob-pa, pf. bslabs, fut. bslab, imp. slob(s)
- to learn, to teach, nga or nga-la slob I learn, ngas slob I teach ... [p. 587]
slobs
- exercise, practice, experience; mig-slobs ngan-pa skye Mil. a bad custom of seeing begins to prevail (viz. that of looking downward, and minding only earthly things).
It appears that we have OC *[zl] corresponding to Tibetan sl-. The Tibetan root would be < pre-Tibetan *slap; the correspondence OC *[@] to Tibetan -a- is regular.