Input (grade 12): Linguists believe that the etymology of the word either involves the Middle High German word lab (to clot) or the word laib (loaf), and the Slavic root quas (feast).
Output (grade 6): Some linguists say, that the word may be related to the German word lab, which means to clot, or the word Laib (loaf). Perhaps it also contains the Slavic root quas (yeast).