'Loose' in the Bible

He answered and hath said, 'Lo, I am seeing four men loose, walking in the midst of the fire, and they have no hurt; and the appearance of the fourth is like to a son of the gods.'

and I -- I have heard of thee, that thou art able to give interpretations, and to loose knots: now, lo -- thou art able to read the writing, and its interpretation to cause me to know -- purple thou dost put on, and a bracelet of gold is on thy neck, and third in the kingdom thou dost rule.'