PORTENT
omen, portent, presage, prognostic, prognostication, prodigy
(noun) a sign of something about to happen; “he looked for an omen before going into battle”
Source: WordNet® 3.1
Etymology
Noun
portent (plural portents)
Something that portends an event about to occur, especially an unfortunate or evil event; an omen.
A portending; significance
Something regarded as portentous; a marvel; prodigy.
Synonyms
• See also omen
Anagrams
• torpent
Source: Wiktionary
Por*tent", n. Etym: [L. portentum. See Portend.]
Definition: That which portends, or foretoken; esp., that which portends
evil; a sign of coming calamity; an omen; a sign. Shak.
My loss by dire portents the god foretold. Dryden.
Source: Webster’s Unabridged Dictionary 1913 Edition