Not being simple; having many parts or aspects. group of buildings or facilities. cause to form complex.

actual application or use of idea. perform activity repeatedly to improve or maintain proficiency.

To make, or become, something better.

existing at beginning. first letter of name or word. To authorize something by writing your initials.

Having a particular role or function. pursuit, area of study, or skill.

action or business of promoting and selling products or services. To publicize products to get you to buy; advertise.

Person who teaches or explains usually as a job.

A letter of recommendation, e.g. for a job. provide book or article with citations of sources of information.

Having power or authority.

Involved in a custom or event common to a people.

Image made of pencil lines, or on a screen. To get closer to or approach something or someone. To take one thing out of a container, etc..

evoking interest, attention, or admiration in powerfully irresistible way. To force someone to do something.

Concerning something that is physical or real. building material. cover with concrete.

officially compulsory, or otherwise considered essential. To need something, to make it necessary.