Academic
a reaction to something (n.)
response
a quick reaction (n.)
reflex
extremely afraid (adj.)
terrified
extremely tired (adj.)
exhausted
the ability or power to be active (work, play) (n.)
energy
to respond with uncontrolled fear to possible danger (v.)
panic
a choice made; conclusion (n.)
decision
to form a picture idea in one's mind (v.)
imagine
to cause something to start or happen (v.)
trigger
an event; something that happens (n.)
experience
a difficult or dangerous situation (n.)
crisis
unknown or difficult to understand (adj.)
mysterious
done without thought or effort (adj.)
automatic
a feeling, such as love, hate, happiness, sorrow (n.)
emotion
based on facts or reasons and not on emotions or feelings (adj.)
rational
wanting to change; anxious; impatient (adj.)
restless
strong (in feeling and emotion) (adj.)
intense
good for protection or keeping something safe (adj.)
defensive
in a state of stress or anxiety because you have too much to do or because people are depending on you (phrase)
under pressure
to shake for a moment because of fear or cold (v.)
shudder
a condition (fact or situation) that affects something else (n.)
circumstance
done in a planned way (adj.)
deliberate
a number, amount, or situation that can change and affect something in different ways (n.)
variable
to be on every side of someone or something (v.)
surround