A rapid change in brightness; a brief spark or flash.

synonyms: scintillation, sparkling.

Merriment expressed by a brightness or gleam or animation of countenance:
— There's a perpetual twinkle in his eyes.

synonyms: light, spark, sparkle.

Polish: iskra, iskierka

Gleam or glow intermittently.

synonyms: blink, flash, wink, winkle.

Roget 113: be instantaneous etc. adj.; twinkle, flash.   

Roget 420: shine, glow, glitter; glister, glisten; twinkle, gleam; flare, flare up; glare, beam, shimmer, glimmer, flicker, sparkle, scintillate, coruscate, flash, blaze; be bright etc. adj.; reflect light, daze, dazzle, bedazzle, radiate, shoot out beams; fulgurate.    clear up, brighten.    lighten, enlighten; levin^†; light, light up; irradiate, shine upon; give out a light, hang out a light; cast light upon, cast light in, throw light upon, throw light in, shed light upon, shed luster upon; illume^†, illumine, illuminate; relume^†, strike a light; kindle etc. (set fire to) 384.    ... show more

Roget 422: be dim, grow dim etc. adj.; flicker, twinkle, glimmer; loom, lower; fade; pale, pale its ineffectual fire [Hamlet]. render dim etc. adj.; dim, bedim^†, obscure; darken, tone down.    ... show more

Emit or reflect light in a flickering manner:
— Does a constellation twinkle more brightly than a single star?.

synonyms: scintillate, winkle.