Select the most appropriate SYNONYM of the given word.

SLACKEN

Diminish 

The most appropriate synonym of the word "slacken" is diminish.

• Slacken means "to become less taut or tense."
• Diminish means "to make or become smaller or less in amount."

The other words do not have the same meaning as "slacken."

• Aberrant means "deviating from what is normal or usual."
• Debilitated means "weakened or exhausted."
• Avarice means "greed for wealth or material possessions."