köken: From late Middle High German gekrœse (“(small) bowels”), itself a compound of ge- + krœs(e). Compare kraus, Middle Low German krȫse, Dutch croos (“bowels, entrails, guts”).
mesentery (the membrane that attaches the intestines to the wall of the abdomen, maintaining their position in the abdominal cavity, and supplying them with blood vessels, nerves, and lymphatics)
köken: Uncertain. Related to бу́ла (búla, “Turkish woman”), so the meaning may have shifted by metonymy to refer to certain types of face veils that Turkish women once wore (e.g. yashmak).