Sentence:  ...but Mr Blifil said, he had received such positive and repeated orders from his uncle, never to keep any secret from him for fear of the <WSD>disquietude</WSD> which it might give him, that he durst not think of disobedience, whatever might be the consequence. 
Meaning of the word marked with <WSD> tags:  A state of disquiet, uneasiness, or anxiety.