Sentence:  At the same time the multiple transvestitism involved - the fat man as girl and as baby , as coquette <WSD>pretending</WSD> to be a baby - touches for a moment horrifyingly upon the secret sources of a life like Jacoby 's , upon the sinister dreams which form the sources of any human life . 
Meaning of the word marked with <WSD> tags:  make believe with the intent to deceive