Main entry: phlegm, lethargy, languor, sluggishness, flatness
Definition: inactivity; showing an unusual lack of energy
Usage: the general appearance of sluggishness alarmed his friends
Main entry: sluggishness
Definition: the pace of things that move relatively slowly
Usage: the sluggishness of the economy; the sluggishness of the compass in the Arctic cold
Main entry: lethargy, lassitude, sluggishness
Definition: a state of comatose torpor (as found in sleeping sickness)