Sentence:  He <WSD>thought</WSD> how this dainty , fragile older woman threading her way through the streets of Westminster on a day in June , enjoying the flowers in the shops , the greetings from old friends , but never really drawing a deep , passionate breath , was so like himself . 
Meaning of the word marked with <WSD> tags:  use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments