Person in charge of a country, or organization.

To take place or occur.

In mathematics, being less than zero. no. In grammar, containing words such as 'no' or 'not'. refuse to accept.

person who is studying or has expert knowledge of one or more of natural or physical sciences.

Feeling that you can do well at something. confidant.

Viewed as a whole; in general, not as details. taken as a whole. trousers formerly worn as part of army uniform.

ceremony or service held shortly after person's death, usually including person's burial or cremation.

in most essential respects.

Showing that a chemical is present in a test. positive quality.

Careful study to better understand something.

before action or event.

Not of the same kind; unlike other things.

Occasion when something can be seen, e.g. a movie. To lead someone somewhere; point them to something.

continuing or valid to final destination. expressing movement into one side and out of other side of opening etc.. Over, in, across an entire thing or place.

Being different from or unrelated to another. individual items of clothing suitable for wearing in different combinations. To live away from your husband or wife.