Relating to or resembling a plague, pestilence, or pest; turbulent or troublesome like a storm.
From empest + -ic (adjective suffix), or possibly from em- + pestic. An exceedingly rare adjective that attempts to describe the quality of being pestered or plague-like.
This word is so obscure that it barely survives in the historical record—it's a ghost of a ghost, created through a logical but ultimately unsuccessful word-formation process that never caught on.
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