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. To remove unwanted substances from a liquid or gas.

part of view that is nearest to observer. make something most prominent or important feature.

as truth or facts.

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

A change to make something function better.

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. Action of rubbing your skin when itchy. 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. Colors or shapes which are repeated on objects. decorate with pattern.

rise in size, amount, or degree of something. To make or become larger in size or amount.

Condition of being strong.