to emit sparks.

to sparkle; flash

a mind that scintillates with brilliance.

to twinkle, as the stars.

Electronics . (of a spot of light or image on a radar display) to shift rapidly around a mean position.

Physics .

(of the amplitude, phase, or polarization of an electromagnetic wave) to fluctuate in a random manner.

(of an energetic photon or particle) to produce a flash of light in a phosphor by striking it.

to emit as sparks; flash forth.

verb

coruscate , glance , gleam , glimmer , glint , glisten , glister , glitter , shimmer , spangle , sparkle , twinkle , wink , charm , flash , shine