Sentence:  In fact, such unfortunate persons have no resource but to become what we call Pedants; to ensconce themselves in a safe world of habitudes, of applicable or inapplicable traditions; not coveting, rather avoiding the general daylight of common-sense, as very extraneous to them and their procedure; by long persistence in which course they become Completed Pedants, <WSD>hidebound</WSD>, impenetrable, able to "defy" the hostile extraneous element; an alarming kind of men 
Meaning of the word marked with <WSD> tags:  Stubborn; narrow-minded; inflexible.