breakthrough Antonyms

severe setback uncivilised throwback unsophisticated uncivilized setback rudimentary reversal retrogressive relegation regressive regression recession primitive outmoded slowdown blind alley not updated big step backward worsened double whammy body blow undeveloped underdeveloped unprogressive nonprogressive fogyish glitch hiccup impasse predicament outdated deadlock dated blow benighted backwards backward avoid archaic antique antiquated antediluvian ancient abdication decline degeneration departure old-fashioned old