to combine or join two or more separate entities into a single whole

complications (undesired side-effect of medical procedure)

to annex territory or states, often through force or historical expansion

to lump together; to treat along with all the others

(medicine) for one disease to be complicated by another; to develop simultaneous medical conditions

to merge, integrate, or incorporate something into a larger entity or system

merger and acquisition (M&A); the act of taking over a company or the process of merging business entities

to annex

to bring separate parts together so they touch or align closely side by side

to consolidate or merge organizations, departments, or institutions, often involving the abolition of redundant units

to put distinct items together or incorporate them into a specific category or collection

(of rival gangs or armed factions etc) to engage in internecine violence or have an open fight

to forcibly take control of a territory or country, often by a more powerful state

union (set theory, symbol ∪)

one after another; in rapid or continuous sequence

occurring simultaneously

combining two or more lengths of yarn into a single thread

to merge or combine multiple entities, such as organizations, departments, or systems, into a single unified whole

a medical complication arising during the course of a disease