ghastly
Definitions
Causing great horror or fear; frightful or macabre.
Extremely unwell or unpleasant; disagreeable.
Resembling a ghost; deathly pale or wan.
Examples
The victim had a ghastly wound on his arm that required immediate medical attention.
It was a ghastly mistake to leave the front door unlocked while we were away on vacation.
The old mansion looked truly ghastly under the pale light of the full moon.
Synonyms
horrific gruesome frightful appalling hideous macabre dreadful
Antonyms
pleasant delightful lovely charming agreeable wonderful appealing