English Words Starting With I

• inradius

  nounC2 (Proficient User)
  /ˈɪnreɪdɪəs/The radius of a circle that is tangent to all sides of a polygon, typically a triangle.
• inrigger

  nounVery Low / Obscure / Technical
  /ˈɪnˌrɪɡə/A type of rowing boat or racing shell where the rower's oarlocks are mounted directly on the boat's gunwale (upper edge), as opposed to an outrigger where they are mounted on projecting frames.
• inro

  nounVery Low
  /ˈɪn.rəʊ/A traditional Japanese tiered container, often made of lacquered wood, used to hold small personal items like medicines, seals, or perfumes, and worn suspended from the obi (sash) of a kimono.
• inroad

  nounC1
  /ˈɪn.rəʊd/An advance or penetration, often sudden or forceful, into an area previously held by others, causing a reduction or encroachment.
• inrush

  nounLow
  /ˈɪnrʌʃ/A sudden, often powerful inward flow or influx of something, typically a fluid, people, or a phenomenon like air or energy.
• ins and outs

  plural-nounB2
  /ˌɪnz ən ˈaʊts/The full and correct details of a complex situation, activity, or set of procedures; the intricate particulars or workings of something.
• insalivate

  verbverb-transitiveVery rare
  /ɪnˈsælɪveɪt/To mix (food) with saliva, especially in the mouth in preparation for swallowing and digestion.
• insanitation

  nounC2
  /ˌɪnsænɪˈteɪʃ(ə)n/The state or condition of being unsanitary or not clean, often leading to unhealthy conditions.
• insanity

  nounC1
  /ɪnˈsænəti/The state of being seriously mentally ill; madness.
• inscape

  nounVery Low
  /ˈɪnskeɪp/The distinctive inner nature or essential quality of a thing, especially in a work of art or literature; its unique, inward form.
• inscribe

  verbverb-transitiveB2
  /ɪnˈskraɪb/To write, carve, or engrave words, symbols, or a design onto a hard surface as a permanent record.
• inscription

  nounC1
  /ɪnˈskrɪpʃ(ə)n/Words or symbols that are written, carved, or engraved onto a surface as a permanent record or message.
• inscroll

  verb-transitiveVery Rare / Archaic
  /ɪnˈskrəʊl/To write or record on a scroll; to enter in a formal or permanent record.
• insculp

  verb-transitiveRare / Archaic
  /ɪnˈskʌlp/To carve, engrave, or cut a design or inscription onto a hard surface.
• inseam

  adjectivenounLow frequency (C1/C2). Specialized term.
  /ˈɪn.siːm/The inner seam of a trouser or garment leg, specifically the measurement from the crotch to the bottom hem along that seam.
• insect

  adjectivenounB1
  /ˈɪn.sekt/A small arthropod animal with six legs, typically having a hard outer shell (exoskeleton) and often wings.
• insect wax

  nounLow
  /ˈɪn.sekt wæks/A waxy substance produced by certain insects, such as scale insects or bees, often used in various industrial applications.
• insecta

  nounLow (C2/Professional/Technical)
  /ɪnˈsɛktə/A taxonomic class of invertebrates characterized by a three-part body (head, thorax, abdomen), six legs, and typically one or two pairs of wings. It is the formal scientific term for insects.
• insectarium

  nounVery Low (C2)
  /ˌɪnsekˈteə.ri.əm/A place, enclosure, or establishment where live insects are kept for study, exhibition, or breeding.
• insectary

  nounLow (Specialist)
  /ˈɪn.sɛk.tər.i/A place for keeping, breeding, and studying insects, especially under controlled conditions.

Showing 1981–2000 of 3621 words.