Sentence:  During her childhood she was a romanticized Katherine, dressed by her misty-eyed, fussy mother in dresses that looked like ruffled pillowcases. By high school she'd shed the frills and emerged as a bouncy, round-faced Kathy - - - At university she was Kath, blunt and no-bullshit in her Take-Back-the-Night jeans and checked shirt - - - When she ran away to England, she sliced herself down to <WSD>Kat</WSD>. It was economical, street-feline, and pointed as a nail. 
Meaning of the word marked with <WSD> tags:  A short form of the female given names Katharine and Katherine.