fact of being advertised or described in particular way. To request payment by handing over an invoice.

action of helping or doing work for someone. To maintain a piece of machinery so it runs well.

A mistake; something you forget to do.

Classification into groups sharing features.

person or thing that provides something.

of no value. not at all. Number or value of zero. Not anything, not a single thing.

thing with distinct and independent existence. Some things that exists by itself, is real.

action of denying something. Statements which claim that some things are not true.

cause, explanation, or justification for action or event. Explanations for why some things occurred or was done. think, understand, and form judgements logically.

Change from one state, movement, place to another. undergo or cause to undergo process or period of transition.

To survive hardships and difficulties; to cope.

involving several parts or elements. number exactly divisible by another number.

(Statistics) being clearly different.

series of actions towards achieving something. perform mechanical or chemical operations on.

Having too much to handle (e.g. work). To affect someone emotionally in a strong way.