likely or prone to be affected by. conditionally upon. People who take part in experiments or tests. cause or force person or thing to undergo.

gladly received. used to greet someone in polite or friendly way. instance or manner of greeting someone. To greet someone who has just arrived.

science of motion. Branch of physics concerned with motion of bodies.

person who is studying at university or other place of higher education. People studying at school.

existing or occurring between nations. game between teams representing different countries.

To know the meaning of language, what someone says.

plural word or form. Word that indicate more than one of something.

arranged in series or according to scale. To get a degree from school, college, university.

abbreviation formed from initial letters of other words. A word made from the first letters of other words.

person taking part in sport or game. People who play musical instruments.

achieved or maintained by careful and deliberate effort. To focus on learning something usually at school.

strive to gain or win something by defeating or establishing superiority over others.

To make someone known to another by name.

for reason that.

aeroplane, helicopter, or other machine capable of flight.