Sentence:  I <WSD>thought</WSD> , and wondered what kind of homesteads such odd pioneers would establish in this suburban frontier ; pioneers who looked like off-duty gardeners even at parent-teacher conferences and who never called the school principal `` Mister '' . 
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