Sentence:  It is clear that , while most writers enjoy picturing the Negro as a woolly-headed , humble old agrarian who mutters `` yassuhs '' and `` sho ' nufs '' with blissful deference to his white employer ( or , in Old South terms , `` massuh '' ) , this stereotype is doomed to <WSD>become</WSD> in reality as obsolete as Caldwell 's Lester . 
Meaning of the word marked with <WSD> tags:  enter or assume a certain state or condition