1540s, from supreme + -acy, or from Latin supremitatem (nominative supremitas). Supremity in same sense is from 1530s.
supra-
supralapsarian
supra-national
supra-nationalism
supremacist
supremacy
supreme
supremist
sur-
sura
surcease
)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}