trepidation - Dictionary definition and meaning for word trepidation
TRAP - soldier on being trapped had the feeling of trepidation/fear.
Tremble >> Trepidation. As he was afraid, he trembled (Trepidation)
concentrate on the starting part, it SOUNDS LIKE RAPID, as in river rafting, rapids make everyone feel alarmed
TREPIDATION and CONSTERNATION have the same sound and meaning. The words describe fear or nervousness.
INTREPID (adj) is contrary to TREPID (adj), so TREPIDATION (noun) is contrary to inTREPID as well.
Trip down in an Expedition causes FEAR...U b'come NERVOUS