1
general::
Compose, assemble, as in There's more to devising an effective slogan than stringing together some words. This expression alludes to threading beads on a string. [First half of 1800s]
American Heritage Idioms
2
general::
Phrase(s): string something together
to connect things, such as beads, together, as with string. • I spent all afternoon stringing beads together. • My pearls broke and I had to take them to a jeweler to have them strung together again.
McGrawhill's American Idioms And Phrasal Verbs