Sentence:  Nothing in all the preceding years had had the power to bring me closer to a knowledge of profound <WSD>sorrow</WSD> than the breakup of camp , the packing away of my camp uniforms , the severing of ties with the six or ten people I had grown most to love in the world . 
Meaning of the word marked with <WSD> tags:  an emotion of great sadness associated with loss or bereavement