Languor

English

Middle English langour, langor, from Old French, from Latin languor, from langure to feel faint, languish -- more at slack

a state of the body or mind caused by exhaustion or disease and characterized by a languid feeling: lassitude <languor of convalescence>
listless indolence: dreaminess
certain languor in the air hinted at an early summer -- James Purdy
dullness, sluggishness: lack of vigor: stagnation
from languor she passed to the lightest vivacity -- Elinor Wylie
obsolete. enfeebling disease: suffering