Etymology

rivaroxaban

R1I1V4A1R1O1X8A1B3A1N1

Today it means: An anticoagulant drug C₁₉H₁₈ClN₃O₅S (trademark Xarelto) that inhibits the activity of factor X and is taken orally especially to prevent and treat deep vein thrombosis and pulmonary embolism and to reduce the risk of stroke related to atrial fibrillation. Full definition →

Latin rīvārō
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The story

  1. Latin · derived fromrīvārō
  2. English todayrivaroxaban

From rivaro- + -xaban (“blood coagulation factor Xa inhibitor”). The prefix is probably from Latin rīvārō, conjugation of rīvō (“to draw off, to withdraw”).

Etymology from Wiktionary, CC BY-SA 4.0.