What is the origin of semaphore?
Semaphore came into English from French sémaphore, a device for making and transmitting signals by line of sight. From the point of view of a purist or pedant, semaphore is a malformed word. The Greek noun sêma means “mark, sign, token,” and its combining form, which should have been used in semaphore, is sēmat-, which would result in sematophore. The combining form -phore comes from the Greek combining form -phoros “carrying, bearing,” a derivative of the verb phérein “to carry, bear.” Semaphore entered English in the 19th century.