Sentence:  Its life may be but for its hour, amid the <WSD>gruellings</WSD> of the world, but for this hour it justifies both its kind and nature, which has produced it, and though it fade and perish, yet it lives as the patterning embodiment of a whole striving after beauty of a creative nature. 
Meaning of the word marked with <WSD> tags:  A gruelling ordeal.