Select the most appropriate ANTONYM of the given word.

FUTILE

productive

The most appropriate antonym of the word "futile" is productive.

• Futile means "producing no useful result or effect; pointless or useless."
• Productive means "yielding results or profits; effective."

The other words do not have the opposite meaning of "futile."

• Hollow means "empty or lacking substance."
• Worthless means "having no value or worth."
• Barren means "not producing or capable of producing offspring or fruit."