SYN: Preface, introduction, exordium, opening, introductory, part.
ANT: Close, termination, peroration, finale, conclusion.
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KEY: Precarious.
SYN: Hazardous, peril, ous, uncertain, riskful, unassured, insecure, dubious, doubtful.
ANT: Assured, certain, systematic, safe, immutable.
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KEY: Precaution.
SYN: Forethought, provision, premunition, anticipation, prearrangement, care, providence.
ANT: Carelessness, thoughtlessness, improvidence.