
1) Rhetorical device
Found on
https://www.crosswordclues.com/clue/aposiopesis

Aposiopesis (s; Classical Greek: ἀποσιώπησις, `becoming silent`) is a figure of speech wherein a sentence is deliberately broken off and left unfinished, the ending to be supplied by the imagination, giving an impression of unwillingness or inability to continue. An example would be the threat `Get out, or else—!` This device oft...
Found on
http://en.wikipedia.org/wiki/Aposiopesis

suddenly stopping in the middle of a speech for emphasis
Found on
http://phrontistery.info/a.html

an interruption of an expresion without a subsequent restarting. See also anacoluthon.
Found on
http://rpo.library.utoronto.ca/display_rpo/terminology.cfm#acatalectic

• (n.) A figure of speech in which the speaker breaks off suddenly, as if unwilling or unable to state what was in his mind; as, `I declare to you that his conduct -- but I can not speak of that, here.`
Found on
http://thinkexist.com/dictionary/meaning/aposiopesis/

(Greek: `becoming silent`), a speaker`s deliberate failure to complete a sentence. Aposiopesis usually indicates speechless rage or exasperation, as ...
Found on
http://www.britannica.com/eb/a-z/a/89

Breaking off as if unable to continue, stopping suddenly in the midst of a sentence, or leaving a st
Found on
http://www.encyclo.co.uk/local/22385

An interruption of an expresion without a subsequent restarting. See also anacoluthon.
Found on
http://www.encyclo.co.uk/local/22429
Ap`o·si`o·pe'sis noun [ Latin , from Greek ..., from ... to be quite silent.]
(Rhet.) A figure of speech in which the speaker breaks off suddenly, as if unwilling or unable to state what was in his mind; as, 'I declare to you that his conduct -- but I can not speak of
that , here.' ...
Found on
http://www.encyclo.co.uk/webster/A/104

Aposiopesis is an abrupt breaking away from a sentence and leaving it unfinished for the sake of greater effect. For example 'his character is such - but it is better I should not speak of that.'
Found on
http://www.probertencyclopaedia.com/browse/AA1.HTM

a form of ellipse by which a speaker comes to an abrupt halt, seemingly overcome by passion (fear, excitement, etc.) or modesty.
*Demosthenes, On the Crown 3
Found on
http://www.uky.edu/AS/Classics/rhetoric.html

[
n] - breaking off in the middle of a sentence (as by writers of realistic conversations)
Found on
http://www.webdictionary.co.uk/definition.php?query=aposiopesis

An abrupt stop in the middle of a sentence; used by a speaker to convey unwillingness or inability to complete a thought or statement.
Found on
https://en.wikipedia.org/wiki/Glossary_of_rhetorical_terms

Aposiopesis is when a sentence is purposefully left incomplete or cut off. It’s caused by an inability or unwillingness to continue speaking. This allows the ending to be filled in by the listener’s imagination.
Found on
https://literaryterms.net/glossary-of-literary-terms/
noun breaking off in the middle of a sentence (as by writers of realistic conversations)
Found on
https://www.encyclo.co.uk/local/20974

a sudden breaking off in the midst of a sentence, as if from inability or unwillingness to proceed.
Found on
https://www.infoplease.com/dictionary/aposiopesis
No exact match found.