scum 02560 ## chamar {khaw-mar'} ; a primitive root ; properly , to boil up ; hence , to ferment (with {scum}) ; to glow (with redness) ; as denominative (from 02564) to smear with pitch : -- daub , befoul , be red , trouble .
scum 4067 - peripsoma {per-ip'-so-mah}; from a comparative of 4012 and psao (to rub); something brushed all around, i.e. off-scrapings (figuratively, {scum}): -- offscouring.