Noun

1. In rhetoric, the technique of reversal, where accentuated by reversal of words, actions or grammatical structure.
   • 2008, Michael E Eidenmuller, Great Speeches For Better Speaking, page 92

     "Mankind must put an end to war or else war will put an end to mankind." Many other instances may be found in kind. As one reserves fine china for the most special occasions and in only the most select company, so Kennedy used his beloved antimetabole.