Sentence:  A creature, so to speak, only half awake, or awake, perhaps, only when she devoured her books and tried to puzzle out her mathematical problems; and going through life by the side of her jealous, brutal, sickly, drunken husband, in a kind of somnambulistic <WSD>indifferentism</WSD>, perhaps not feeling her miseries very acutely, and probably not envying other women their meaningless liberty, their inane lovers, their empty wholeness of life. 
Meaning of the word marked with <WSD> tags:  ("more broadly") Relativism, agnosticism; apathy, indifference.