(p. pr. & vb. n.) of Frighten.

alarming appalling awing browbeating bulldozing bullying chilling cowing daunting demoralization deterrent deterring dire disconcerting discouraging disheartening dismaying disquieting distressing dreadful fear-inspiring fearful fearsome formidable frightful hair-raising harrowing hectoring horrifying intimidating intimidation overawing petrifying psychological warfare scaring scary shocking spooky startling terrifying war of nerves