Sentence:  The remarks she made about the sufferings of a lonely woman seemed so broad at first that he did n't <WSD>know</WSD> what to make of them , but after the sixth drink he put his arm around her and suggested that they go upstairs and look for her checkbook there . 
Meaning of the word marked with <WSD> tags:  be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about