To cause to lose sparkle or shine; to make dull or dim by removing brilliance.
From dis- (reverse, remove) + sparkle (from Middle Dutch sparkelen). The word is extremely rare and appears mainly in poetic or literary contexts describing loss of brightness or vitality.
You'll almost never encounter this word in modern English, but poets used it beautifully to describe how grief or time 'disparkles' a person's eyes—dimming their natural light!
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