English Words Starting With I

• insecticide

  nounC1
  /ɪnˈsektɪsaɪd/A chemical substance used to kill insects.
• insectifuge

  nounVery rare
  /ɪnˈsɛktɪfjuːdʒ/A substance that repels or drives away insects.
• insectivora

  nounC2
  /ˌɪnsɛkˈtɪvərə/An order of mammals that primarily feed on insects.
• insectivore

  nounC1/C2 (Low-frequency, academic/technical term)
  /ɪnˈsɛktɪvɔː/An animal that primarily eats insects.
• insectivorous bat

  nounC1
  /ˌɪnsekˈtɪv(ə)rəs bæt/A mammal of the order Chiroptera that primarily feeds on insects, typically catching them in flight using echolocation.
• insectology

  nounLow / Very Rare
  /ˌɪnsekˈtɒlədʒi/A synonym for entomology; the scientific study of insects.
• insecurity

  nounC1
  /ˌɪnsɪˈkjʊərəti/A state of being uncertain, anxious, or lacking confidence about oneself or a situation; the condition of being open to danger, threat, or instability.
• inselberg

  nounC2
  /ˈɪns(ə)lbəːɡ/An isolated, steep-sided hill or small mountain rising abruptly from a plain.
• inseminate

  verbverb-transitiveC2
  /ɪnˈsemɪneɪt/To introduce semen into a female's reproductive tract, especially artificially.
• inseminator

  nounLow
  /ɪnˈsɛmɪneɪtə/A person or device that introduces semen into a female animal or human for reproduction.
• inseparable

  adjectivenounB2
  /ɪnˈsɛp(ə)rəb(ə)l/Unable to be separated, parted, or disconnected.
• insert

  nounverbverb-transitiveC1
  verb: /ɪnˈsɜːt/, noun: /ˈɪnsɜːt/to put or place something into something else.
• insertion

  nounC1
  /ɪnˈsɜː.ʃən/The act of putting something into something else.
• insertion element

  nounTechnical/Very Low
  /ɪnˈsɜːʃən ˈɛlɪmənt/A short, mobile DNA sequence that can move within a genome.
• inset

  nounverbverb-transitiveLow
  /ˈɪnset/A thing that is put in or inserted; a small picture, map, diagram, etc., inserted within the border of a larger one.
• inset initial

  nounC2
  /ˈɪnset ɪˈnɪʃl/A large decorative letter, often an illuminated capital, placed at the beginning of a text or paragraph, sometimes set into (inset within) the body of the text rather than projecting into the margin.
• insheathe

  verb-transitiveVery Low / Archaic
  /ɪnˈʃiːð/To put into or enclose in a sheath, scabbard, or protective covering.
• inshrine

  verbverb-transitiveVery low
  /ɪnˈʃraɪn/To enclose, preserve, or honor something as if in a shrine; to cherish as sacred.
• inside

  adjectiveadverbnounprepositionA1
  /ˌɪnˈsaɪd/The inner side, surface, or part of something; within a container, building, or area.
• inside caliper

  nounVery Low (C2+ Technical)
  /ˌɪn.saɪd ˈkæl.ɪ.pə/A measuring tool with two inward-facing legs used to measure the internal dimensions of an object, such as the inside diameter of a hole or cylinder.

Showing 2001–2020 of 3621 words.