something that is kept or meant to be kept unknown or unseen by others. Information that others do not know.

action of capturing. To catch and prevent from being free.

involving secret work within community or organization. Operating in disguise; incognito.

practice of spying or of using spies.

concerned with or involving theory of subject or area of study rather than its practical application.

thing designed or used for inflicting bodily harm or physical damage. Some things that are used for fighting, e.g. guns.

causing great surprise or wonder. To cause wonder; to surprise completely.

having paid employment. action of doing work. To make an effort to do something.

maintenance of constant difference in frequency between two or more connected circuits or components. To move along a certain course.

number. Shapes of people seen indistinctly or in outline. have significant part or role in situation etc..

small mechanical or electronic device or tool. Interesting or unusual tool with a practical use.

Marking a significant change in something. person who advocates or engages in political revolution.

Person of high position in an organization. provide with military officers.

as truth or facts.