assemble
US /əˈsem.bəl/
UK /əˈsem.bəl/

1.
gather together in one place for a common purpose
:
•
The students began to assemble in the auditorium for the morning meeting.
•
The crowd began to assemble outside the concert hall.
2.
fit together the separate component parts of (a machine or other item)
:
•
It took him hours to assemble the new furniture.
•
The factory workers assemble cars on the production line.