Choose the most appropriate ANTONYM of the given word.

CURTAIL

Prolong 

The most appropriate antonym of the word curtail is prolong.

• Curtail means "to reduce in extent or quantity."
• Prolong means "to extend in time or duration."

The other words do not have the same meaning as prolong.

• Refute means "to prove (a statement or theory) to be false."
• Paramount means "of supreme importance."
• Nuance means "a subtle or delicate difference or variation in meaning, expression, or sound."