Definition of: aposiopesis

(ap′ə·sī′ə·pē′sis) noun
A sudden interruption of a thought in the middle of a sentence, as if the speaker or writer were unable or unwilling to continue. Example: When I perceived the delights of paradise
—but who could describe them? [ <L <Gk. aposiōpēsis < aposiōpaein < apo- from + siōpaein be silent]
—ap′o·si′o·pet′ic (-pet′ik) adjective