gather A2

/ˈɡæðɚ/ To come together in one place, or to bring people or things together.

forgather C2+

/fɔrˈɡæðɚ/ to assemble or gather together, especially socially

woolgathering C2+

/ˈwʊlˌɡæð.ɚ.ɪŋ/ absent-minded daydreaming or aimless musing