Conversation between two or more individuals. take part in dialogue.

porous device removing impurities etc. from liquid or gas. Devices to remove certain types of light, sound. pass liquid etc. through filter.

The area in front of a picture or person. make something most prominent or important feature.

Used to add new (often different) information.

relating to tutor or tutor's tuition. period of tuition given by university or college tutor.

Small change to attain a desired state or function.

Not of the same kind; unlike other things.

include as necessary or integral part.

assembled or made from whatever is available, and so unlikely to be of highest quality. A small cut or mark on a surface. To make a small cut or mark on a surface.

Lack of friendliness toward another person. make distant in position or nature.

performed using random selection. To arrange in a random order.

Past events that influence things in the present.

repeated decorative design. Regular repeated behavior. To copy the way something else is made.

Fact of increasing; amount something grows by. To make or become larger in size or amount.

quality or state of being physically strong.