An Etymological Dictionary of Astronomy and Astrophysics

The state or condition of not flowing or running.
→ stagnation point, → stagnation pressure.

Etymology (EN): L. stagnatum, stagnatus, p.p. of stagnare “to stagnate,” from stagnatum “standing water,” from PIE root *stag- “to seep drip.”

Etymology (PE): Nâravâni, literally “not flowing,” from nâ- negation prefix, → un-, + ravân “flowing, running,” pr.p. of raftan “to go, walk; to flow;” (Mid.Pers. raftan, raw-, Proto-Iranian *rab/f- “to go; to attack”).