certainty

Từ điển American Heritage Dictionary 4th

cer·tain·ty (sûrʹtn-tē)n. pl. cer·tain·ties
1. The fact, quality, or state of being certain:
the certainty of death.
2. Something that is clearly established or assured: “On the field of battle there are no certainties” (Tom Clancy).  
Synonyms: certainty, certitude, assurance, conviction
These nouns mean freedom from doubt. Certainty implies a thorough consideration of evidence: “the emphasis of a certainty that is not impaired by any shade of doubt” (Mark Twain). Certitude is based more on personal belief than on objective facts: “Certitude is not the test of certainty” (Oliver Wendell Holmes, Jr.). Assurance is a feeling of confidence resulting from subjective experience: “There is no such thing as absolute certainty, but there is assurance sufficient for the purposes of human life” (John Stuart Mill). Conviction arises from the vanquishing of doubt: “His religion... was substantial and concrete, made up of good, hard convictions and opinions. (Willa Cather).

• Từ đồng nghĩa / Synonyms:
  sure thing, foregone conclusion
• Từ trái nghĩa / Antonyms:
  uncertainty, uncertainness, precariousness, doubt, incertitude, dubiety, doubtfulness, dubiousness