STAGNANT

stagnant, moribund

(adjective) not growing or changing; without force or vitality

stagnant, dead(a)

(adjective) not circulating or flowing; “dead air”; “dead water”; “stagnant water”

Source: WordNet® 3.1

Etymology

Adjective

stagnant (comparative more stagnant, superlative most stagnant)

Lacking freshness, motion, or flow; decaying through stillness.

(figurative) Without progress or change; stale; inactive.

Source: Wiktionary

Stag"nant, a. Etym: [L. stagnans, -antis, p.pr. of stagnare. See Stagnate.]

1. That stagnates; not flowing; not running in a current or steam; motionless; hence, impure or foul from want of motion; as, a stagnant lake or pond; stagnant blood in the veins.

2. Not active or brisk; dull; as, business in stagnant. That gloomy slumber of the stagnant soul. Johnson. For him a stagnant life was not worth living. Palfrey.

Source: Webster’s Unabridged Dictionary 1913 Edition