Shading

[Little_Girl]

That filling up which represents the effect of more or
less darkness, expressing rotundity, projection, etc., in a picture or
a drawing.

[Jessica]

To avoid obligations by hiding.
To leave without permission.
To leave work early.
To avoid undesirable work.
Some one who is lazy often refered to as a shade or shader.

[Donald Trump]

When a person is good at moving in shadows or without being noticed.

[Hina Muqadas]

wearing sunglasses indoors

[Renato]

Shading occurs when you hide your relationship from your friends even though they know you have someone in your life

[Julene]

The darkening or colouring of an illustration or diagram with parallel lines or a block of colour.

[Dorothey Allen]

present participle of shade