English Words Starting With I

• infatuation

  nounB2
  /ɪnˌfætʃ.uˈeɪ.ʃən/A short-lived, intense, and foolish passion for someone or something, often based on superficial attraction rather than deep knowledge or love.
• infauna

  nounLow
  /ɪnˈfɔːnə/Animals that live within the substrate of a body of water, especially within the seafloor sediment.
• infect

  adjectiveverbverb-intransitiveverb-transitiveB2
  /ɪnˈfɛkt/To transmit a disease or harmful microorganism to (a person, organism, or thing).
• infectee

  nounC1/C2 (Upper-Intermediate to Advanced)
  /ɪnˈfɛk.tiː/A person or organism that has been infected with a disease-causing agent (pathogen).
• infection

  nounB2
  /ɪnˈfɛkʃ(ə)n/The process or state of being invaded and harmed by a pathogenic microorganism (e.g., bacteria, virus, fungus).
• infectious anemia of horses

  nounC2
  /ɪnˌfek.ʃəs əˈniː.mi.ə əv ˈhɔː.sɪz/A specific, contagious viral disease of horses, causing destruction of red blood cells and resulting in anemia.
• infectious bovine rhinotracheitis

  nounVery Low
  /ɪnˌfek.ʃəs ˌbəʊ.vaɪn ˌraɪ.nəʊˌtreɪ.kiˈaɪ.tɪs/A contagious viral disease of cattle, primarily affecting the respiratory tract.
• infectious canine hepatitis

  nounLow
  /ɪnˌfek.ʃəs ˈkeɪ.naɪn ˌhep.əˈtaɪ.tɪs/A specific viral disease of dogs, caused by canine adenovirus type 1 (CAV-1), primarily affecting the liver.
• infectious disease

  nounB2
  /ɪnˌfek.ʃəs dɪˈziːz/A medical condition caused by pathogenic microorganisms (like bacteria, viruses, fungi, or parasites) that can be transmitted directly or indirectly from one individual to another.
• infectious hepatitis

  nounLow
  /ɪnˌfek.ʃəs ˌhep.əˈtaɪ.tɪs/An acute viral infection of the liver, historically a term for hepatitis A.
• infectious laryngotracheitis

  nounC2
  /ɪnˌfek.ʃəs ləˌrɪŋ.ɡəʊˌtreɪ.kiˈaɪ.tɪs/A specific viral respiratory disease of chickens and other birds, causing inflammation of the larynx and trachea.
• infectious mononucleosis

  nounLow
  /ɪnˌfek.ʃəs ˌmɒn.əʊ.njuː.kliˈəʊ.sɪs/A viral illness, commonly known as glandular fever or mono, caused by the Epstein-Barr virus and characterized by fever, sore throat, swollen lymph nodes, and fatigue.
• infelicity

  nounC2
  /ˌɪnfɪˈlɪsɪti/The quality or state of being inappropriate, unsuitable, or unhappy; an instance of this.
• infer

  verbverb-intransitiveverb-transitiveB2/C1
  /ɪnˈfɜː(r)/To deduce or conclude information from evidence and reasoning, rather than from direct statement.
• inference

  nounC1
  /ˈɪnfərəns/A conclusion reached on the basis of evidence and reasoning.
• inferencing

  nounC1
  /ˈɪnfərənsɪŋ/The cognitive process of drawing conclusions or making deductions from evidence, reasoning, or known facts.
• inferential statistics

  nounLow
  /ˌɪn.fərˈen.ʃəl stəˈtɪs.tɪks/The branch of statistics that uses data from a sample to make predictions or draw conclusions about a larger population.
• inferior

  adjectivenounB2
  /ɪnˈfɪə.ri.ər/Lower in rank, status, or quality.
• inferior conjunction

  nounC1 (Technical/Very Low Frequency in General English)
  /ɪnˌfɪə.ri.ə kənˈdʒʌŋk.ʃən/An astronomical configuration where a planet lies directly between Earth and the Sun.
• inferior court

  nounLow
  /ɪnˌfɪə.ri.ə ˈkɔːt/A court whose decisions can be reviewed or appealed to a higher court (a superior court).

Showing 1561–1580 of 3621 words.