IPA: //aʊtˈspɑːr.kəl//
KK: /aʊtˈspɑrkəl/
To shine or sparkle more brightly than something else.
The diamond seemed to outsparkle all the other gems in the display.
Past: outsparkled
Past Participle: outsparkled
Outsparkle → It is formed from "out-" (meaning beyond or external) and "sparkle" (from Middle English *sperclen*, meaning to emit sparks or shine). The word "outsparkle" means to shine or sparkle more brightly than something else or to exceed in brilliance.
Think of shining "beyond" ('out-') what is normal or expected, which is what it means to outsparkle.