person who carries out academic or scientific research. People who work to find new facts and ideas.

something difficult to understand or explain. Books, plays, or films about solving a strange crime.

branch of science concerned with nature and properties of matter and energy. The study of heat, light, and energy on objects.

The way in which the parts of a system or object are arranged or organized, or a system arranged in this way. To plan, organize, or arrange the parts of something.

engaging in speech. action of talking. To say things or ideas to someone with words.

having specified appearance. To appear to be when you look at them; seem.

taking account of when reaching total. To matter or be important.

Quality of being strange and not understood.

plan or course of action. Plan to achieve a desired result. To determine the value or importance of something.

remark expressing opinion. Some things you say, giving opinions; remarks. To say something that gives your opinion.

having all necessary parts. To finish or reach the end of doing something.

ancient Egyptian stone structure. arrange in shape of pyramid.

not known or familiar. unknown person or thing.

discover exact place of.

Being what was wanted or needed. used to greet someone in polite or friendly way. Friendly greeting to someone who has arrived. To greet someone who has just arrived.