Which of the following words is closest in meaning to “Acrimonious”?

Acrimonious means bitter and harsh in tone or manner.

• Correct answer - bitter: it has the same meaning as Acrimonious.
• volatile: likely to change suddenly - wrong, it does not mean the same as Acrimonious.
• expansive: wide-ranging; outgoing - wrong, it does not mean the same as Acrimonious.
• agitated: restless and disturbed - wrong, it does not mean the same as Acrimonious.