
Lassitude
Physical Exhaustion
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.
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.
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.
Compare with
DebilityEnervationExhaustionFatigueLethargyTirednessTorporWeariness
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