"one who advocates or practices obstructionism, one who factiously opposes and hinders the action of others," 1846, from obstruction + -ist.
obstipation
obstreperous
obstruct
obstruction
obstructionism
obstructionist
obstructive
obtain
obtainable
obtrude
obtrusion
)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}