ugly

displeasing to the senses and morally revolting

• “an ugly face”
• “ugly furniture”
• “war is ugly”

deficient in beauty

• “ugly gray slums”

inclined to anger or bad feelings with overtones of menace

• “a surly waiter”
• “an ugly frame of mind”

morally reprehensible

• “would do something as despicable as murder”
• “ugly crimes”
• “the vile development of slavery appalled them”
• “a slimy little liar”

threatening or foreshadowing evil or tragic developments

• “a baleful look”
• “forbidding thunderclouds”
• “his tone became menacing”
• “ominous rumblings of discontent”
• “sinister storm clouds”
• “a sinister smile”
• “his threatening behavior”
• “ugly black clouds”
• “the situation became ugly”

provoking horror

• “an atrocious automobile accident”
• “a frightful crime of decapitation”
• “an alarming, even horrifying, picture”
• “war is beyond all words horrible” Winston Churchill
• “an ugly wound”