prong

Concise Oxford English Dictionary © 2008 Oxford University Press:
prong/prɒŋ/

▶noun

• 1 each of two or more projecting pointed parts on a fork or other device.

• 2 each of the separate parts of an attack or operation.

▶verb pierce or stab with a fork.

– derivatives
pronged adjective.

– origin C15: perh. rel. to Mid. Low Ger. prange ‘pinching instrument’.