A figure in which an epithet of a contrary signification is added to a word; e. g., cruel kindness; laborious idleness.
words of opposite meaning or suggestion are used together. example: a wise fool, cruel kindness, to make haste slowing.
is a contradiction in two words placed next to each other to heighten the contrast eg. "Parting is such sweet sorrow." from ROMEO AND JULIET by William Shakespeare