Sentence:  It was not merely its quiet monotony, its unbroken sameness of topics as of events, and its small economies, always appearing on the surface; but that a young girl like Kate, full of life and spirits, gay, handsome, and <WSD>high-hearted</WSD>, — that she should go her mill-round of these tiresome daily cares, listening to the same complaints, remedying the same evils, meeting the same difficulties, and yet never seem to resent an existence so ignoble and unworthy! 
Meaning of the word marked with <WSD> tags:  Full of liveliness and passion, vivacious.