Strong's H4833מִרְפָּשׂ: muddled water KJV:that which...have fouled.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.
Root family 2199: רָפַסrāpas — stamp, tread, foul by stamping, treading; a fountain befouled; stamp oneself down, humble thyself; trample, prostrate, roil water; humble self, submit self, foul, trouble