Sentence:  Time and again in counseling and teaching , one encounters members of this group whose attempts to bring into some kind of unity the insubstantial mythologies of their `` fundamentalist '' heritage and the <WSD>stubborn</WSD> reality of the modern world are only too painfully obvious . 
Meaning of the word marked with <WSD> tags:  tenaciously unwilling or marked by tenacious unwillingness to yield