Cowardice

Cowardice is a characteristic wherein excessive fear prevents an individual from taking a risk or facing danger. It is the opposite of courage. As a label, "cowardice" indicates a failure of character in the face of a challenge. One who succumbs to cowardice is known as a coward.

As the opposite of bravery, which many historical and current human societies reward, cowardice is seen as a character flaw that is detrimental to society and thus the failure to face one's fear is often stigmatized or punished. Provided by Wikipedia