aposiopesis
noun
a sudden breaking off in the midst of a sentence, as if from inability or unwillingness to proceed.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Then came an expressive silence, which Philip construed as an aposiopetic allusion to this young gentleman whose face had been pushed in.
From A Knight on Wheels by Ian Hay