Sentence:  Professionally a lawyer , that is to say associated with dignity , reserve , discipline , with much that is essentially middle-class , he is compelled by an <WSD>impossible</WSD> love to exhibit himself dressed up , disguised - that is , paradoxically , revealed - as a child , and , worse , as a whore masquerading as a child . 
Meaning of the word marked with <WSD> tags:  not capable of occurring or being accomplished or dealt with