Plural of high; the highest points or levels, or moments of great happiness and excitement.
From Old English 'hēah,' meaning elevated or tall. The abstract sense of emotional peaks developed later, comparing emotional states to physical height.
The human brain literally gets 'high' from natural chemicals—dopamine, serotonin, endorphins—which is why achievements, exercise, and social connection feel like peaks, connecting our emotional language to actual brain chemistry!
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