'Act' in the Bible

'And I speak unto you, and ye have not hearkened, and provoke the mouth of Jehovah, and act proudly, and go up into the hill-country;

'And the sons of Israel have journeyed from Beeroth of the sons of Jaakan to Mosera, there Aaron died, and he is buried there, and Eleazar his son doth act as priest in his stead;

To Jehovah do ye act thus, O people foolish and not wise? Is not He thy father -- thy possessor? He made thee, and doth establish thee.