Select the most appropriate ANTONYM of the given word.

Treacherous

Faithful

The most appropriate antonym of the word "treacherous" is faithful.

• Treacherous means "disloyal or untrustworthy; likely to betray."
• Faithful means "loyal or constant in allegiance or duty."

The other answer choices are not as good antonyms of "treacherous" because they do not have the same meaning of "loyal or constant."

• Fantastic means "extremely good or impressive."
• Flexible means "able to bend or be bent easily."
• Fluent means "able to speak or write a language easily and smoothly."