1660s, "capable of being withstood," from oppose + -able. In reference to the thumbs of humans and certain other animals, "capable of being so placed as to be in opposition," by 1819. Related: Opposability.
the thumb is opposable to the forefinger
opportune
opportunism
opportunist
opportunistic
opportunity
opposable
oppose
opposite
opposition
oppositional
oppress
)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}