Fear is a feeling induced by perceived danger or threat that occurs in certain types of organisms, which causes a change in metabolic and organ functions and ultimately a change in behavior, such as fleeing, hiding, or freezing from perceived traumatic events. Fear in human beings may occur in response to a specific stimulus occurring in the present, or in anticipation or expectation of a future threat perceived as a risk to body or life. The fear response arises from the perception of danger leading to confrontation with or escape from/avoiding the threat (also known as the fight-or-flight response), which in extreme cases of fear (horror and terror) can be a freeze response or paralysis.
In humans and animals, fear is modulated by the process of cognition and learning. Thus fear is judged as rational or appropriate and irrational or inappropriate. An irrational fear is called a phobia.
Psychologists such as John B. Watson, Robert Plutchik, and Paul Ekman have suggested that there is only a small set of basic or innate emotions and that fear is one of them. This hypothesized set includes such emotions as acute stress reaction, anger, angst, anxiety, fright, horror, joy, panic, and sadness. Fear is closely related to, but should be distinguished from, the emotion anxiety, which occurs as the result of threats that are perceived to be uncontrollable or unavoidable. The fear response serves survival by generating appropriate behavioral responses, so it has been preserved throughout evolution.
Anticipating something with anxiety or fear.
Perceptive; quick to learn; capable of understanding using one's intellect.
"quick on the uptake"
Feeling fear; afraid, frightened.
anxious or fearful that something bad or unpleasant will happen
"he felt apprehensive about going home"
relating to perception or understanding.
Capable of apprehending, or quick to do so; apt; discerning.
Knowing; conscious; cognizant.
Relating to the faculty of apprehension.
Anticipative of something unfavorable' fearful of what may be coming; in dread of possible harm; in expectation of evil.
Sensible; feeling; perceptive.
quick to understand;
"a kind and apprehensive friend"
mentally upset over possible misfortune or danger etc; worried;
"anxious about her job"
"not used to a city and anxious about small things"
"felt apprehensive about the consequences"
in fear or dread of possible evil or harm;
"apprehensive for one's life"
"apprehensive of danger"
"the frightened child cowered in the corner"
"too shocked and scared to move"