Sentence:  It is also instructive to consider the relation of these dreams to anxiety dreams. In the dreams we have been discussing, a repressed wish has found a means of evading censorship—and the distortion which censorship involves. The invariable <WSD>concomitant</WSD> is that painful feelings are experienced in the dream. 
Meaning of the word marked with <WSD> tags:  Something happening or existing at the same time.