sphere of liquid enclosing gas. Small balls of air inside of a liquid. (Of a liquid) to produce bubbles, as when boiling.

No more and no less than; precisely.

Not having curves, bends, or angles. in straight line. part of something that is not curved.

rowing or sailing in boats as sport or form of recreation. To travel on a lake or river.

round part of eye of vertebrate, within eyelids and socket. look or stare at closely.

Wipe with a special cleaning cloth. clean or scrape with squeegee.

place or angle where two sides or edges meet. Places where two lines, sides, corners etc. meet. To go around a bend in the road (often by driving).

Note in a book, etc. giving source of information. provide book or article with citations of sources of information.

more distant in space. A greater distance; at a more distant point. (Used to introduce an additional point); also. help or promote.

polluting or poisonous substance that makes something impure. Substance that pollutes or causes to be impure.

To go to or in a place for a brief period of time.

keep something from happening.

Of the top layer; not deep or meaningful. Top layer of the ground or of water. To come to the top of something; emerge.

event in which people compete. compete to attain power.

Picture that is pressed to copy it onto something. To get off a plane, bus etc. and get on another.