early 15c., from infinite + -ly (2).
he is infinitely wealthy
there are infinitely many possibilities
infield
in-fighting
infiltrate
infiltration
infinite
infinitely
infinitesimal
infinitive
infinitude
infinity
infirm
)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}