Sentence:  Juanita drooped about the place , wearing a haunted , brooding look , which Kate attributed to the <WSD>baby</WSD> 's death , until the day a letter came for her addressed to `` Miss Juanita Fitzroy '' , bearing a Grafton postmark . 
Meaning of the word marked with <WSD> tags:  a very young child (birth to 1 year) who has not yet begun to walk or talk