Frightful /(?)/

Fright·ful

Frightful

a.
  1. Full of fright; affrighted; frightened. [Obs.]
    See how the frightful herds run from the wood.
    — W. Browne.
  2. Full of that which causes fright; exciting alarm; impressing terror; shocking; as, a frightful chasm, or tempest; a frightful appearance.