Peg

a wooden pin pushed or driven into a surface

small markers inserted into a surface to mark scores or define locations etc.

informal terms for the leg

a prosthesis that replaces a missing leg

regulator that can be turned to regulate the pitch of the strings of a stringed instrument

a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing

succeed in obtaining a position

pierce with a wooden pin or knock or thrust a wooden pin into

fasten or secure with a wooden pin

stabilize (the price of a commodity or an exchange rate) by legislation or market operations