Sentence:  As I have been intimating , in the schizophrenic - and perhaps also in the dreams of the neurotic ; this is a question which I have no wish to take up - condensation is a phenomenon in which one finds not a condensed expression of various feelings and ideas which are , at an unconscious level , well sorted out , but rather a condensed expression of feelings and ideas which , even in the unconscious , have yet to <WSD>become</WSD> well differentiated from one another . 
Meaning of the word marked with <WSD> tags:  enter or assume a certain state or condition