Used when describing an extreme level of physical tiredness, not just feeling sleepy. After the marathon, I experienced a profound lassitude that lasted for days.
Pro Tip 2/3
Emotional Weight
Can imply a feeling of being emotionally overwhelmed in addition to physical tiredness. The news of the tragedy enveloped the community in a lassitude that went beyond mere physical fatigue.
Pro Tip 3/3
Not Laziness
Different from laziness, lassitude suggests an inability to act due to tiredness, not a choice. Her lassitude was not from laziness but from working three jobs.