etymology of liaison

 Etymology of "liaison":

- The word "liaison" comes from the French word "liaison," which means "a union, a binding together"

- The French word "liaison" ultimately comes from the Late Latin word "ligatio," meaning "a binding," which is derived from the past participle stem of the Latin verb "ligare," meaning "to bind"

- The word "liaison" was first used in English in the 1640s as a cookery term for a thickening agent for sauces

- The sense of "intimate relations" (especially between lovers) is from 1806

- The military sense of "cooperation between branches, allies, etc." is from 1816

- The meaning "one who is concerned with liaison of units, etc." is short for "liaison officer" (1915).

- The verb "liaise" comes from "liaison" and typically means to act as a liaison by arranging, assisting, and communicating