English Words Starting With I

• inertial guidance

  nounC2
  /ɪˌnɜːʃəl ˈɡaɪdəns/A navigation system that uses sensors to continuously calculate the position, orientation, and velocity of a moving object without needing external references.
• inertial mass

  nounC2
  /ɪˌnɜː.ʃəl ˈmæs/The measure of an object's resistance to changes in its state of motion, quantified as the ratio of the net force acting on it to the acceleration produced.
• inertial observer

  nounC2 (Very Low Frequency)
  /ɪˌnɜː.ʃəl əbˈzɜː.və/A hypothetical frame of reference, in physics, that is not accelerating and experiences no net external force, used as a baseline for measuring motion.
• inertial platform

  nounC2
  /ɪˌnɜː.ʃəl ˈplæt.fɔːm/A stabilised physical base or framework within a navigation system that uses gyroscopes and accelerometers to maintain a fixed orientation independent of the vehicle's motion, providing a stable reference for measuring acceleration and movement.
• inertial system

  nounC2
  /ɪˌnɜː.ʃəl ˈsɪs.təm/A frame of reference in which a body with no external forces acting upon it moves with constant velocity, or a system that uses this principle for navigation.
• inertial upper stage

  nounLow (technical/niche)
  /ɪˈnɜːʃl̩ ˈʌpə steɪdʒ/A rocket stage or propulsion system designed to place satellites into specific orbits after initial launch, using inertial guidance systems.
• inescutcheon

  nounVery low (C2+)
  /ˌɪnɪˈskʌtʃən/A small shield placed in the centre of a larger shield (escutcheon) in heraldry.
• inessential

  adjectivenounC1
  /ˌɪnɪˈsɛnʃ(ə)l/Not necessary or fundamental; able to be done without.
• inessive

  adjectivenounC2
  /ɪˈnɛsɪv/The grammatical case indicating location inside something or within a state.
• inevitable

  adjectivenounC1
  /ɪnˈevɪtəb(ə)l/certain to happen; unavoidable.
• inexactitude

  nounC1
  /ˌɪnɪɡˈzæktɪtjuːd/A lack of exactness or accuracy; something that is not precisely correct.
• inexertion

  nounVery Low (Extremely Rare)
  /ˌɪnɪɡˈzɜːʃ(ə)n/The state or fact of not exerting oneself; lack of effort or activity.
• inexperience

  nounC1
  /ˌɪnɪkˈspɪəriəns/A lack of knowledge, skill, or practice in a particular field, situation, or activity.
• inexpressible

  adjectivenounC1
  /ˌɪn.ɪkˈspres.ə.bəl/Too intense, profound, or overwhelming to be described or put into words.
• inez

  nounLow (primarily as a personal name)
  /ˈiːnez/, /aɪˈnez/A female given name, a variant of Agnes.
• infallibilism

  nounVery Low
  /ɪnˈfælɪbɪlɪzəm/The doctrine or belief that a specific entity (often a person, institution, or knowledge system) is incapable of error or possesses absolute certainty.
• infallibility

  nounC1
  /ɪnˌfæl.ɪˈbɪl.ə.ti/The quality of being incapable of making mistakes or being wrong.
• infallible

  adjectivenounC1
  /ɪnˈfæl.ə.bəl/Incapable of making mistakes or being wrong; never failing.
• infamize

  verbVery Rare / Archaic
  /ˈɪnfəmaɪz/To make someone or something infamous; to spread damaging reports about.
• infamy

  nounC1-C2
  /ˈɪnfəmi/The state of being well known for a bad quality or deed; extreme public disgrace or wickedness.

Showing 1521–1540 of 3621 words.