Existing or happening before the present time.

sudden occurrence of something unwelcome.

user of professional service. People paying for professional services.

in space separating things. In the space that separates two objects.

Method or way of sending or receiving information. To direct water or liquid through a passage.

distribute resources or duties for particular purpose.

To protect and care for someone or something.

Doing your job. action of doing work. To make an effort to do something.

Not being simple; having many parts or aspects. Group of buildings all used for the same purpose. cause to form complex.

Specific group of people from a larger group. To divide something into smaller parts.

person qualified to practise medicine. A medical doctor.

person, object, or place selected as aim of attack. Some things to shot at; to practice shooting. select as object of attention or attack.

arrange to receive something regularly by paying in advance.

intensify, increase, or further improve quality, value, or extent of.