An Etymological Dictionary of the German Language/spülen
Appearance
spülen, vb., ‘to rinse, wash,’ from the equiv. MidHG. spüelen, OHG. spuolen, wk. vb.; corresponding to the equiv. Du. spoelen, AS. spêlan. Its connection with the preceding word is not clear. — The corresponding collective Spülicht, n., ‘dish-wash, swill,’ is based on MidHG. spüelach (OHG. *spuolahi).