Something lacking any type of colour is black.

The result of some mental activity is called a thought.

Materials that are man-made are called synthetic.

Something that is just below the surface is called superficial.

A distinct pathway for people or cars is a street.

To open a door or window is to unbolt it.

An extremely important part of the body is your brain which controls all of your bodily functions. 

The importance or worth of something is its value.

Up to a set time is referred as until.

If you are not present either mentally or physically, you may be called absent.