Select the most appropriate ANTONYM of the given word.

Assiduous

Idle

The most appropriate antonym of the word assiduous is idle.

• Assiduous means showing great care, attention, and effort.
• Idle means lazy or inactive.

The other words listed are not antonyms of assiduous.

• Belligerent means aggressive or warlike.
• Meticulous means very careful and exact.
• Idyllic means peaceful and tranquil.