assume

verb

• To authenticate by means of belief; to surmise; to suppose to be true, especially without proof

  "We assume that, as her parents were dentists, she knows quite a bit about dentistry."

• To take on a position, duty or form

  "Mr. Jones will assume the position of a lifeguard until a proper replacement is found."

• To adopt a feigned quality or manner; to claim without right; to arrogate

  "He assumed an air of indifference"

• To receive, adopt (a person)
• To adopt (an idea or cause)