IPA: /ˈlɪnʧˌpɪn/
KK: /ˈlɪn(t)ʃˌpɪn/
A person or thing that is essential to a system or organization, holding everything together.
The project manager is the lynchpin of our team, ensuring that everyone works together effectively.
Lynchpin → The word 'lynchpin' is derived from 'lynch' (originating from the name of a 19th-century American, William Lynch, associated with extrajudicial punishment) and 'pin' (from Old English 'pinn', meaning a small, slender piece of metal or wood). The term refers to a crucial element that holds various parts together, much like a pin holds components in place.
Think of a 'pin' that holds things together, and remember that a 'lynchpin' is something essential that keeps everything connected.