shadowing

Shade.

Shading: gradation of light and shade; also, the art of representing such gradations.

Shade, or gradation of light and color; shading.

A faint representation; an adumbration.

Present participle of shadow.

The effect of being shadowed (in the sense of blocked), as from a light source or radio transmission.

Speech shadowing is when an individual repeats speech as they hear it immediately without delay (usually through earphones).

Secretly or discreetly tracking or following someone, keeping under surveillance.

A faint representation; an adumbration.

the act of following someone secretly