"urine used as a detergent," 1570s, from chamber (n.) in the "privy" sense + lye.
challis
cham
chamber
chambered
chamberlain
chamber-lye
chambermaid
chamber-pot
chambray
chameleon
chamfer
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}