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What is an appropriate synonym for the term 'sluggish'?

  1. Placid

  2. Plausible

  3. Lethargic

  4. Vivid

The correct answer is: Lethargic

The term 'sluggish' describes a state of being slow or lacking energy, often associated with a general sense of inactivity or lethargy. The synonym 'lethargic' directly aligns with this meaning, as it also refers to a condition of drowsiness, sluggishness, or a lack of energy and vitality. Both terms evoke a similar sense of sluggish movement or response, making 'lethargic' the most fitting choice in this context. On the other hand, the other terms do not match the meaning of 'sluggish.' 'Placid' implies a calm and peaceful nature, 'plausible' refers to something that can be believed or is reasonable, and 'vivid' describes something that is bright, intense, or clear. These terms do not capture the essence of being slow or lacking in energy, which is fundamental to the meaning of 'sluggish.'