lye
UK[laɪ]US[laɪ]
n
A strongly alkaline solution, especially of potassium hydroxide or sodium hydroxide, used for washing or cleansing.
Etymology
The word 'lye' has a direct lineage from Old English 'lēag', which referred to the alkaline substance itself. This Old English term descended from the Proto-Germanic 'laugō', a word shared by other Germanic languages, such as Old High German 'louga'. The ultimate origin is the Proto-Indo-European root 'leu(ə)-', meaning 'to wash'. This etymological journey clearly illustrates the word's enduring functional logic: from an ancient root concept denoting the action of washing to the specific name for the caustic substance used for that very purpose throughout history.
Analysis
The word 'lye' is a simplex word of Germanic origin. It functions as a single, unanalyzable morpheme in modern English.
Examples
Traditional soap was made by mixing animal fat with wood ash lye.
The recipe warns to handle the lye with extreme care as it can cause severe burns.
Before modern detergents, lye was a common household cleaning agent.