Sentence:  Although the Celebrity was almost impervious to sarcasm, he was <WSD>now</WSD> beginning to exhibit visible signs of uneasiness, the consciousness dawning upon him that his eccentricity was not receiving the ovation it merited. 
Meaning of the word marked with <WSD> tags:  Differently from the immediate past; differently from a more remote past or a possible future; differently from all other times.