1. stagnant - Adjective
2. stagnant - Adjective Satellite
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.
Not active or brisk; dull; as, business in stagnant.
Source: Webster's dictionarydead air Source: Internet
dead water Source: Internet
stagnant water Source: Internet
According to the rapper, the world evolves so people need to be able to adapt to certain changes because they were not put on the earth to remain stagnant. Source: Internet
Also, according to Shiffman, while slip demand has steadily ticked up since 2004, the supply side has been virtually stagnant. Source: Internet
And in the absence of even being able to open a window, even just opening the door itself allows air to come in and out, and flow so it doesn't get stagnant in the classroom itself. Source: Internet