consolidate

•  verb [I,T]

1    to combine two or more things such as organizations, jobs, or large amounts of money to form a single thing that is more effective:
?In the 1950s several small school systems were consolidated into one large one.
2    to make your power stronger or make sure that you continue to be successful:
?I felt that it was time to consolidate my position in the company.
consolidation noun [C,U]