English Words Starting With I

• illuminance

  nounC2 (Proficient)
  /ɪˈluː.mɪ.nəns/The luminous flux per unit area; a measure of how much light falls on a surface, quantifying its brightness.
• illuminant

  adjectivenounC1
  /ɪˈluːmɪnənt/A source of light or something that provides illumination.
• illuminate

  adjectivenounverbverb-intransitiveverb-transitiveC1
  /ɪˈluːmɪneɪt/To make something clear and easier to understand by explaining it, or to light something up.
• illuminati

  plural-nounC2
  /ɪˌluːmɪˈnɑːti/A group claiming special spiritual or intellectual enlightenment; historically, the plural of 'illuminato', an enlightened person.
• illumination

  nounC1
  /ɪˌluː.mɪˈneɪ.ʃən/Lighting something up; the action of providing light.
• illuminator

  nounC2
  /ɪˈluː.mɪ.neɪ.tər/A person or thing that provides light or enlightenment.
• illumine

  verbverb-ambitransitiveC2 (Very low frequency, literary/archaic)
  /ɪˈluː.mɪn/To light up; to make bright with light.
• illuminism

  nounVery Low
  /ɪˈluːmɪnɪz(ə)m/A philosophical or religious belief system centered on the idea of achieving spiritual enlightenment or intellectual illumination, often through direct personal insight or mystical experience.
• illuminometer

  nounVery Low
  /ɪˌluːmɪˈnɒmɪtə/A specialized instrument for measuring the intensity of illumination.
• illusion

  nounB2
  /ɪˈluːʒn/A false idea or belief, especially one that deceives the senses or mind.
• illusionism

  nounC1/C2
  /ɪˈluːʒənɪz(ə)m/The practice or technique of creating illusions, especially in art, magic, or philosophy.
• illusionist

  nounB2
  /ɪˈluːʒənɪst/A performer who creates illusions or deceptive appearances, especially as entertainment; a magician.
• illustrate

  verbverb-intransitiveverb-transitiveB2
  /ˈɪləstreɪt/To make something clear or explain it, often by using examples, pictures, or diagrams.
• illustrated

  adjectivenounB2
  /ˈɪl.ə.streɪ.tɪd/Made clear or explained visually, typically with pictures or examples.
• illustration

  nounC1
  /ˌɪl.əˈstreɪ.ʃən/A picture, drawing, or diagram that helps explain or decorate a text.
• illustrator

  nounB2
  /ˈɪləstreɪtə(r)/A person who creates pictures, drawings, or diagrams, especially for a book, magazine, or other publication.
• illuviate

  verb-intransitiveVery Low
  /ɪˈluːvɪeɪt/To deposit material (especially dissolved or suspended particles) from an upper soil layer into a lower layer through the action of water.
• illuviation

  nounvery low
  /ɪˌluː.viˈeɪ.ʃən/The accumulation of dissolved or suspended soil materials (like clay, iron, or humus) in a lower soil layer, having been leached down from an upper layer.
• illuvium

  nounVery low
  /ɪˈluːviəm/Material (like clay, humus, or iron) that has been washed down and deposited in a lower layer of soil.
• illyria

  nounRare
  /ɪˈlɪ.ri.ə/An ancient region on the western Balkan Peninsula, stretching along the eastern coast of the Adriatic Sea.

Showing 481–500 of 3621 words.