means A merger is the combining of two companies into a single entity, pooling their assets, operations, and ownership.

from From the verb 'merge,' which traces to the Latin 'mergere,' meaning 'to dip, plunge, or immerse' — the same root that surfaces in 'submerge' and 'emerge.' Originally a legal term: when one thing was 'merged' into another, the smaller was absorbed and ceased to exist on its own. The corporate sense, with its '-er' suffix turning the action into a thing, grew up in the language of law and finance, where one entity quietly drowns inside another.