WordReference Random House Learner's Dictionary of American English © 2014
fright•en•ing /ˈfraɪtənɪŋ/USA pronunciation adj. 

    causing fear or anxiety.

Collins Concise English Dictionary © HarperCollins Publishers::

frighten /ˈfraɪtən/ vb (transitive)
  1. to cause fear in; terrify; scare
  2. to drive or force to go (away, off, out, in, etc) by making afraid

ˈfrightening adj ˈfrighteningly adv

'frightening' also found in these entries:

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