Multiple choice

Directions: Choose the word or phrase which is opposite in meaning to the keyword.

Questionable

  1. Dubious

  2. Challengeable

  3. Certain

  4. Persistent

  5. Effective
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Questionable means doubtful, open to doubt, or not reliable. Its opposite is certain, which means sure, definite, or beyond doubt. Dubious is a synonym, not an antonym.

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