ox·y·mo·ron   /ˌɒksɪˈmɔrɒn, -ˈmoʊr-/ Show Spelled[ok-si-mawr-on, -mohr-] Show IPA
–noun, plural -mo·ra  /-ˈmɔrə, -ˈmoʊrə/ Show Spelled[-mawr-uh, -mohr-uh] Show IPA. Rhetoric .
a figure of speech by which a locution produces an incongruous, seemingly self-contradictory effect, as in “cruel kindness” or “to make haste slowly.”