An Etymological Dictionary of the German Language/kochen

by Friedrich Kluge

kochen, ‘to cook,’ from the equiv. MidHG. kochen, OHG. chohhôn, from Lat. coquere (more accurately *coquâre?). The HG. word could not remain a str. vb., because the vowel of the stem differed from the analogy of verbs of that class. In Rom. note Fr. cuire, Ital. cuocere. Comp. also Kuchen.