Mortar and Pestle

Mortar and Pestle used to be a household staple in olden times. They are called ഉരൽ and ഉലക്ക, respectively.

ഉരൽ comes from ഉര- , to grind. But what about ഉലക്ക?

Interestingly, it also comes from the same root. One etymology is that ഉരം + കൽ = ഉരംക്കൽ -> ഉലക്ക.

(r --> l sound change has been attested in many languages and many words. )