English Words Starting With F

• factive

  adjectivenounC2
  /ˈfæktɪv/A linguistic term referring to predicates or verbs that presuppose the truth of their complement clause. In philosophy, it refers to mental states that entail the truth of their propositional content.
• factoid

  nounLow-Mid
  /ˈfæk.tɔɪd/A piece of information that is repeated so often it is accepted as true, but which may be false or unverified.
• factor

  nounverbverb-intransitiveverb-transitiveC1 (Very High)
  /ˈfaktə/A circumstance, fact, or influence that contributes to a result or outcome.
• factor analysis

  nounC1/C2 (Academic/Technical)
  /ˈfæk.tər əˈnæl.ə.sɪs/A statistical method used to describe variability among observed, correlated variables in terms of a potentially lower number of unobserved variables called factors. It aims to find underlying patterns or structures.
• factor cost

  nounC2
  /ˈfæk.tə ˌkɒst/The total cost of producing a good or service, measured in terms of the payments made to the factors of production (land, labour, capital, enterprise).
• factor group

  nounC2
  /ˈfæk.tə ˌɡruːp/In mathematics (specifically group theory), a group formed by taking the set of cosets of a normal subgroup under the operation induced by the original group.
• factor in

  verbB2
  /ˈfæk.tər ɪn/To include something as a relevant element when making a calculation, decision, or plan.
• factor of adhesion

  nounVery Low Frequency
  /ˈfæk.tər əv ədˈhiː.ʒən/A numerical ratio representing the force required to make a wheel slip on a rail, compared to the weight on that wheel, in railway engineering.
• factor of production

  nounC1/C2
  /ˈfæk.tər əv prəˈdʌk.ʃən/An input or resource used in the process of creating goods or services. In classical economics, the four primary factors are land, labour, capital, and entrepreneurship.
• factor of safety

  nounLow
  /ˈfæktər əv ˈseɪfti/The ratio of a structure's maximum strength to the actual load it is expected to bear, providing a margin of error against failure.
• factor viii

  nounRare (Common in specific medical/biological contexts)
  /ˌfæk.tər ˈeɪt/A specific protein in blood plasma that is essential for normal blood clotting; its deficiency causes Hemophilia A.
• factorage

  nounLow
  /ˈfæktərɪdʒ/The business or role of a factor (an agent who sells goods for a principal).
• factorial

  adjectivenounC2
  /fækˈtɔː.ri.əl/The product of all positive integers from 1 to a given number n, denoted as n!.
• factorian deep

  nounVery Low
  /fækˈtɔːrɪən diːp/An extremely deep, isolated depression in the ocean floor, typically found within a larger ocean basin, named after the research vessel that discovered it.
• factoring

  nounB2/C1
  /ˈfæk.tər.ɪŋ/The process of breaking down a number or mathematical expression into its multiplicative components (e.g., 12 = 3 x 4).
• factorize

  verbverb-transitiveC2
  /ˈfæk.tər.aɪz/To break down a number into its constituent factors; to express an algebraic expression as a product of its factors.
• factors

  nounHigh
  /ˈfæk.təz/Elements, circumstances, or conditions that actively contribute to a result or situation.
• factory

  nounB1
  /ˈfækt(ə)ri/A building or complex of buildings where goods are manufactured on a large scale using machines and labour.
• factory farm

  nounC1/C2
  /ˈfækt(ə)ri fɑːm/A large-scale industrial operation where animals are kept and raised in confined conditions for maximum productivity and profit.
• factory outlet

  nounB1
  /ˈfækt(ə)ri ˈaʊtlɛt/A shop where a manufacturer sells its products directly to the public, often at reduced prices.

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