Pe > References for ‘pebble’
[155] Upa – lá + d́a. [...] piece of stone” or “pebble”, in Hindi roŕe, in Urdu and Farsi saḿreje.
[6] The situation is similar with sakala [...] upalasakala refers to an entire pebble while upalashakala refers to a piece of a pebble. A simple little error like this [...] yet cleaned themselves”.