coolthn.
英 kuːlθ | 美
中文n. 冷静；漠然（等于coolness）
词根词源
coolth (n.)1540s, from cool on the model of warmth. It persists, and was used by Pound, Tolkien, Kipling, etc., but it never has shaken its odor of facetiousness and become standard.
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