join

the shape or manner in which things come together and a connection is made

a set containing all and only the members of two or more given sets; “let C be the union of the sets A and B”

become part of; become a member of a group or organization; “He joined the Communist Party as a young man”

cause to become joined or linked; “join these two parts so that they fit together”

come into the company of; “She joined him for a drink”

make contact or come together; “The two roads join here”

be or become joined or united or linked; “The two streets connect to become a highway”; “Our paths joined”; “The travelers linked up again at the airport”