Sentence:  To Edward ... he was terrible, nerve-inflaming, poisonously asphyxiating. He sat rocking himself in the late Mr. Churchill's <WSD>swing</WSD> chair, smoking and twaddling. 
Meaning of the word marked with <WSD> tags:  (hanging seat) A hanging seat in a children's playground, for acrobats in a circus, or on a porch for relaxing.