Which word indicates a loss of energy or vitality?

The word "torpid" is associated with a loss of energy or vitality, often describing a state of sluggishness or inactivity. It originates from the Latin "torpidus," which means stiff or numb, highlighting a diminished physical or mental state. This term perfectly captures the essence of feeling devoid of energy, where one might experience lethargy or a lack of enthusiasm.

The other words, while having their own meanings, do not convey the same sense of decreased vitality. "Truant" refers to someone who shirks responsibility, particularly in school settings, and does not imply a loss of energy. "Transcendent" denotes something that goes beyond ordinary limits, often relating to excellence or elevation rather than a lack of energy. "Terminate," on the other hand, means to bring something to an end and does not reflect the idea of energy levels or vitality.