fleetingly Antonyms

for ever so long in perpetuity until hell freezes over forevermore continuingly 24-7 enduringly for good boringly lastingly once and for all inalterably for eternity 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 all the time ceaselessly invariably endlessly durably continuously continually constantly consistently amply always ad infinitum enormously eternally everlastingly slowly perpetually permanently interminably greatly forever extensively extendedly evermore abidingly