Stagnant

Part of speech: adjective (a.)

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.