Webster's Revised Unabridged Dictionary · 1913

Stagnate

Stagnate (stag"nāt) , intransitive verb

[Latin stagnatus, past participle of stagnare to stagnate, make stagnant, from stagnum a piece of standing water. See Stank a pool, and compare Stanch, transitive verb]

1.
To cease to flow; to be motionless; as, blood stagnates in the veins of an animal; hence, to become impure or foul by want of motion; as, air stagnates in a close room.
2.
To cease to be brisk or active; to become dull or inactive; as, commerce stagnates; business stagnates.
Ready-witted tenderness... never stagnates in vain lamentations while there is any room for hope. — Sir W. Scott

Stagnate (-nat) , adjective

Stagnant. [Obsolete]
A stagnate mass of vapors. — Young