Sentence:  ... but <WSD>inexorable</WSD> yron detaines him in the dungeon of the night, fo that (pure creature) hee can neither traffique with the mercers and tailers as he was wont, nor dominere in tavernes as hee ought. 
Meaning of the word marked with <WSD> tags:  Impossible to prevent or stop; inevitable. (from mid 16th c.)