contact with facts or events. To gain knowledge by doing things.

process of doing something. Some things that a person or things do. To take action to do something.

half-pillar or half-pier attached to wall to support arch. say something in reply.

Being of interest at the current time. postage stamp forming part of set or collection with designs connected with same subject.

operated by largely automatic equipment. To use machines to do tasks instead of people.

charming and attractive. To carry out, participate in; be involved in.

as used in conversation.

commercial activity. Companies formed for making profit.

gladly received. used to greet someone in polite or friendly way. Friendly greeting to someone who has arrived. To accept or receive something happily and gladly.

action or fact of owning, maintaining, or protecting something. To maintain the rules.

branch of mechanics concerned with motion and forces. Study of motion and force.

To make, cause, or bring into existence.

Front, especially one between military positions.

person employed to look after technical equipment or do practical work in laboratory.