adj .
caustic ; full of bitterness 신랄한, 황산 같은 ; 신랄함으로 가득한

• ##### is another name for sulfuric acid. To be _____ is to say or do something so nasty that your words or actions burn like acid.
• The review of the new book was so _____ that we all wondered whether the reviewer had some personal grudge against the author.