State of difficulty or stress. To do difficult or bad things which cause problems.

systematic investigation into and study of materials and sources. To study in order to discover new ideas and facts.

thing that bears weight of something or keeps it upright. To hold up or prevent from falling down.

having condition that restricts ability to function. To make it difficult for someone to make progress.

Widespread, normal or usual. Top ranked officer in the army.

self-confident, level-headed, or well organized. With the same physical position.

experiencing mental or emotional strain or tension. To put pressure on something or someone.

Ways in which the parts of a living thing operate.

A city in western central Italy, the capital of Tuscany, on the Arno River; population 365,659 (2008). Florence was a leading center of the Italian Renaissance, especially under the rule of the Medici family during the 15th century..

To make or become larger in size or amount.

scientific study of behaviour, structure, physiology, classification.

Unimportant or irrelevant; trivial. Educator teaching at a college or university. Concerning education, schools, universities, etc..

Activity or subject one enjoys doing or learning. To make someone want to know about something.