terrible; dreadful

very bad; terrible

likely to cause danger

hazardous, troubling

great fear and anxiety

horrible, terrifying

causing distress

dangerous, frightening

that cannot be defined or put in words

unspeakable

that cannot be put into words

unspeakable

very surprising

frightful

menacing, ominous

menacing, ominous

causing worry, unhappiness, difficulty

bothersome, worrisome

not safe

dangerous

that cannot be expressed or described in words

very bad; beyond description

causing worry

troublesome