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KEY: Portal.
SYN: Gate, entrance, gateway, [See ENTRANCE].
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KEY: Portend.
SYN: Indicate, threaten, prognosticate, forbode, augur, presage, herald, foreshow, betoken.
ANT: Contradict, negative, preclude, forefend, nullify, contravene, avert.
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KEY: Portentous.
SYN: Indicative, suggestive, threatening, prophetic, predictive, ominous, premonitory.