Where does “pahat” come from?

pahat (Indonesian) comes from Malay pahat, from Proto-Malayic *pahət, from Proto-Malayo-Polynesian *paqət — chisel.

pahat (Indonesian): chisel: a cutting tool used to remove parts of stone, wood or metal by pushing or pounding the back when the sharp edge is against the material. It consists of a slim, oblong block of metal with a sharp wedge or bevel formed on one end and sometimes a handle at the other end