Gadit

mainstay

Definitions
1nounA person or thing on which something else is based or depends; a chief support.
The local library is a mainstay of the community, providing resources and a space for events.
She is the mainstay of the team, always reliable and supportive.
The mainstay of their diet is rice, which they eat with almost every meal.
Word Origin
Language
English
Word parts
main (chief, principal) + stay (support)
Originally meant
a chief support or main support
Background
The term 'mainstay' originally referred to a strong rope on a ship that held the mainmast in place, ensuring the ship's stability. Over time, it came to be used metaphorically for anything that provides essential support.