IPA: /ˈpɪtən/
KK: /ˈpɪtən/
A metal spike used in climbing that is driven into rock or ice to hold a rope securely.
The climber used a piton to secure his rope while ascending the steep cliff.
Piton comes from the French word 'piton', meaning a spike or peg used in climbing. The term is derived from the verb 'piter', which means to drive in or to stake down. Thus, 'piton' refers to a device that is driven into a surface to provide support or anchorage.
Think of a 'spike' or 'peg' that is 'driven in' to secure something — that's what a piton does in climbing.