frightening adj.
VERBS be, feel, look, seem, sound | become, get The situation was getting quite frightening. | make sth What can we do to make the experience less frightening? | find sth He found the responsibility rather frightening.
ADV. extremely, genuinely, positively, really, truly, very | almost | a bit, fairly, a little, pretty, quite, rather
PREP. for This is extremely frightening for elderly people. | to It was all very frightening to a small boy.
You can also check other dicts: frightening (English, 中文解释 ), wordnet sense, Collins Definition