Select the most appropriate synonym of the given word.

Slack

Careless

The most appropriate synonym of the word "slack" is careless.

• Slack means not tight or taut.
• Careless means not paying attention or not taking care.

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

• Lively means full of life and energy.
• Keen means having or showing a strong interest or enthusiasm.
• Active means vigorous or energetic.