Linchpins

Part of speech: noun

Definitions

1. A fundamental element that binds different components cohesively
2. A vital connector that maintains the integrity of an entire structure
3. An essential piece that secures and unites various parts into a whole

Etymology: The word is the plural of "linchpin," and the singular has a surprisingly literal origin. Its first half, "linch," comes from Old English "lynis," meaning the pin that holds a wheel on an axle, so a linchpin was once a physical peg that kept a cart wheel from sliding off. The second half is simply "pin." Within that picture lies the figurative sense. The word's ancestry reaches back through Proto-Germanic "lunaz," which has relatives in German "Lünse" and Dutch "luns," all naming the same small wheel-fastening part. Some scholars have also suggested distant links to words meaning "wheel" or "spine," though these connections remain uncertain. The metaphorical use of "linchpin" for an indispensable person or idea only appears in the mid-20th century. Once the small pin had become a symbol of something that held everything together, people began applying it to anything whose removal would cause the whole structure to collapse.

Synonyms: keystone, cornerstone, essential, hub, pivot

Antonyms: nonessential, insignificant, irrelevant, trivial, unimportant