a sudden breaking off in the midst of a sentence, as if from inability or unwillingness to proceed.
Origin: 1570–80; < LL < Gk: lit., a full silence, equiv. to aposiōpē- (verbid s. of aposiōpáein to be fully silent; apo-apo-+ siōpáein to be silent) + -sis-sis
ap·o·si·o·pe·sis (āp'ə-sī'ə-pē'sĭs) n.
pl.ap·o·si·o·pe·ses (-sēz) A sudden breaking off of a thought in the middle of a sentence, as though the speaker were unwilling or unable to continue.
[Late Latin aposiōpēsis, from Greek, from aposiōpān, to become silent : apo-, intensive pref.; see apo- + siōpān, to be silent (from siōpē, silence).] ap'o·si'o·pet'ic (-pět'ĭk) adj.