Scintillare

Part of speech: verb

Definitions

1. To emit sparks or flashes of light, signifying brilliance or enthusiasm; to sparkle or twinkle in a lively or animated manner; to convey a sense of vitality and energy through brightness and radiance
2. To produce or reflect scattered light like stars in the night sky, creating a shimmering effect; to exhibit charm or allure that captivates attention; to express a lively and vivid presence in a situation
3. To illuminate suddenly in a brilliant manner, reminiscent of dazzling stars; to attract and fascinate others with an engaging and spirited display; to manifest vitality through bright and lively visual effects

Etymology: "Scintillare" is a Latin verb meaning "to sparkle" or "to flash," and it comes from "scintilla," a spark. The spark itself is the older and more concrete idea: Latin "scintilla" denoted a tiny fiery particle, the kind thrown off by striking flint or by a fire, and English later borrowed the noun as "scintilla" in the sense of a trace or particle of something. The verb built from it carries that image of quick, bright flashes rather than steady light. English took the verb as "scintillate" in the early 1600s, and it kept the physical sense of sparkling, especially of stars and gems. The figurative senses in your meaning, such as captivating an audience or showing lively vitality, developed later and grew out of the same image: a person who scintillates throws off sparks of wit or charm, much as a fire throws off sparks.

Synonyms: sparkle, twinkle, flash, gleam, glimmer

Antonyms: dim, darken, fade