at or near boiling point. action of boiling liquid. To cook in very hot water.

Concerning or located in the air around us.

action or fact of owning, maintaining, or protecting something. To stop balls going in a goal in sports.

pad pressed on to body to relieve inflammation or stop bleeding. To make smaller; reduce in time, size etc..

person who flies in balloon.

Giving better treatment to one person than another. overtone or harmonic.

To defend someone or something from harm or danger.

continuing or valid to final destination. From the beginning of something until the end. By a particular way or process; by the use of.

To hold something inside something else.

(E.g. of plane cabin) being under pressure. To add pressure to something (e.g. a diving suit).

mentally or physically tiring. To have clothes, glasses, shoes etc. on your body.

Concerning reality or the laws of nature.

Act of moving with your legs at a slowish pace. move at regular pace by lifting and setting down each foot in turn.

relating to orbit or orbits. each of actual or potential patterns of electron density that may be formed in atom or molecule by one or more electrons.

Force, weight when pressing against a thing. To persuade or force someone to do something.