enervation

As an adjective listless

is lacking energy, enthusiasm, or liveliness.

As a noun enervation is

act of enervating; debilitation.

As nouns the difference between enervation and degeneration

is that enervation is act of enervating; debilitation while degeneration is degeneration, morbidity.

Enervation is a related term of languor.

As nouns the difference between enervation and languor

is that enervation is act of enervating; debilitation while languor is (uncountable) a state of the body or mind caused by exhaustion or disease and characterized by a languid feeling: lassitude.

Enervation is a related term of overtiredness.

As nouns the difference between enervation and overtiredness

is that enervation is act of enervating; debilitation while overtiredness is the state of being overtired; exhaustion.

Enervation is a related term of drowsiness.

As nouns the difference between enervation and drowsiness

is that enervation is act of enervating; debilitation while drowsiness is state of being drowsy.

Lassitude is a related term of enervation.

As nouns the difference between lassitude and enervation

is that lassitude is lethargy or lack of energy; fatigue while enervation is act of enervating; debilitation.

As nouns the difference between weariness and enervation

is that weariness is exhaustion, fatigue or tiredness while enervation is act of enervating; debilitation.

Exhaustion is a related term of enervation.

As nouns the difference between exhaustion and enervation

is that exhaustion is the point of complete depletion, of the state of being used up while enervation is act of enervating; debilitation.

As nouns the difference between enervation and tedium

is that enervation is act of enervating; debilitation while tedium is boredom or tediousness; ennui.

Tiredness is a related term of enervation.

As nouns the difference between tiredness and enervation

is that tiredness is the state of being tired while enervation is act of enervating; debilitation.