'Loose' in the Bible

John answered, saying to all, 'I indeed with water do baptise you, but he cometh who is mightier than I, of whom I am not worthy to loose the latchet of his sandals -- he shall baptise you with the Holy Spirit and with fire;

Then the Lord answered him and said, 'Hypocrite, doth not each of you on the sabbath loose his ox or ass from the stall, and having led away, doth water it?

and if any one doth question you, Wherefore do ye loose it? thus ye shall say to him -- The Lord hath need of it.'

and while they are loosing the colt, its owners said unto them, 'Why loose ye the colt?'