trepid- (Latin: agitated, alarmed, restless, anxious, solicitous; consternation).intrepid: 
Fearless; undaunted; daring; brave.
 
intrepidity: 
Fearlessness; firmness of mind in the presence of danger; courage, boldness.
 
trepid: 
Trembling; agitated; fearful.
 
trepidant, trepidating: 
Trembling with fear or agitation.
 
trepidation: 
Tremulous agitation; confused hurry or alarm; confusion; flurry; perturbation.
 
trepidity: 
Agitation, alarm, fearfulness.
 
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