Impending p. pr. & vb. n. : of Impend

Impending a. : Hanging over; overhanging; suspended so as to menace; imminet; threatening.

Example:
Do Dogs have a premonition for an Impending death?

Taxonomy
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Defination from the web:
impend from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... menace b : to be about to occur <the impending trial> 2 archaic : to hang suspended. Learn more about "impending" with Google Search: ...