Assume

1. To receive or adopt.
2. To take for granted, or without proof; to suppose as a fact; to suppose or take arbitrarily or tentatively.
3. To be arrogant or pretentious; to claim more than is due.
4. To pretend to possess; to take in appearance.
5. To take to or upon one's self; to take formally and demonstratively; sometimes, to appropriate or take unjustly.
6. To undertake, as by a promise.