Torpor is a noun that refers to a state of physical or mental inactivity.

In Latin, the word torpore (tore POOR ay) means ‘be numb’ or ‘sluggish.’ Our word of the day may refer to a time of mental inactivity or it may generally refer to lethargy.

After running the marathon, I felt a torpor for a few days. This kind of sluggishness is common for marathon runners.