to fasten or join (something) (to another)

join, fasten

to work in partnership

work together

(to cause things) to become united as one (physical) thing

combine, link

to join, fix, (things) firmly

make secure; join together

(to cause business companies) to become one unit; to fade or change gradually into something

bring or come together

to hang something up (from); (of solid particles in the air, a liquid etc) to be or remain in place

hang from above