Assume (verb)

1. To take on or take up a position, role, or responsibility.
2. To adopt a particular attitude or stance towards something.
3. To accept or suppose something to be true without evidence or proof.
4. To take ownership or control of something.

Origin:

From the latin word "assumere" meaning "to take on or take up".

Examples:

1. He assumed the role of the CEO of the company.
2. She assumed a different identity for her undercover work.
3. They assumed that the project would be completed on time.
4. The government assumed control of the failing bank.