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coagulate (v.)

early 15c., "to clot, congeal, become curdled, change from a liquid into a thickened mass; to make to clot," from Latin coagulatus, past participle of coagulare "to cause to curdle," from cogere "to curdle, collect" (see cogent). The earlier verb was coagule, c. 1400, from Old French coaguler and directly from Latin. Related: Coagulated; coagulating.