to twinkle; to flicker; to glisten; to shine with a moving or unsteady light

to be vague or noncommittal; to equivocate; to avoid speaking directly or clearly, often in the phrase 闪烁其词 shǎn​shuò​qí​cí

(of electronics or physics) a flash of light produced in a transparent material by the passage of a particle or a photon