Sentence:  I carried it on as far as this with a sort of <WSD>indifferency</WSD> that he often wondered at, more than at first, but which was the only support of his courtship; and I mention it the rather to intimate again to the ladies that nothing but want of courage for such an <WSD>indifferency</WSD> makes our sex so cheap, and prepares them to be ill-used as they are; would they venture the loss of a pretending fop now and then, who carries it high upon the point of his own merit, they would certainly be less slighted, and courted more. 
Meaning of the word marked with <WSD> tags:  A lack of strong feeling; indifference.