fleetingly Antonyms

for ever so long in perpetuity until hell freezes over forevermore continuingly 24-7 enduringly for good boringly lastingly all the time once and for all inalterably as long as we live as long as we both shall live at slow speed at minimum speed at low speed at a slow pace at a leisurely pace for perpetuity ages and ages for eternity ceaselessly unchangeably invariably enormously endlessly durably continuously continually constantly consistently amply always ad infinitum eternally everlastingly slowly perpetually permanently irreversibly interminably greatly forever extensively extendedly evermore abidingly