What is the Latin word for stagnate?

The usual Latin words for “stagnate” are stāgnō, coāgulō. The right choice depends on the sense; see the distinctions below.

English → Latin

“stagnate” in Latin

stāgnōto cover the land as a lake; to become a pool; to stagnate coāgulōto curdle; make thick, solid; to coagulate

The English word stagnate itself goes back to Latin stāgnum, through stāgnātus.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

stagnate

stagnare (Plin.): immotum esse (Cic.): coagulari (to coagulate).

Quick answer

What is the Latin word for stagnate?: The usual Latin words for “stagnate” are stāgnō, coāgulō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.