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

situated beneath surface of ground. beneath surface of ground. group or movement organized secretly to work against existing regime.

causing great enthusiasm and eagerness. To cause a reaction; make active.

relating to or produced by volcano or volcanoes.

Best liked or most enjoyed. A thing that someone likes best or enjoys most.

What you ask about; issue. To ask for or try to get information.

person who is studying or has expert knowledge of one or more of natural or physical sciences. People who are trained in a science.

fossil reptile of Mesozoic era. Reptile that lived millions of years ago.

person with whom one spends time. People who keep you company, goes out with you. accompany.

Out-dated; very old-fashioned.

Mountain through which hot liquid earth can erupt.

Of practical use of machine/science in industry. undefined.

Connection between two or more things.

Of the top layer; not deep or meaningful. outside part or uppermost layer of something. To appear after being hidden, unseen, or unknown.

To move closer on all sides of something.