I

English words starting with letter “i” with Greek origins:

1. Iamb – From Greek ‘iambos’ (metrical foot).
2. Iambic – From ‘iambos’, a type of poetic verse.
3. Iatrogenic – From ‘iatros’ (physician) and ‘genos’ (origin).
4. Ichthyology – From ‘ichthys’ (fish) and ‘logos’.
5. Icosahedron – From ‘eikosa’ (twenty) and ‘hedron’ (base, seat).
6. Icon – From ‘eikona’
7. Iconography – From ‘eikona’ image and graphein (to write)
8. Icthyosaur – From ‘ichthys’ and ‘sauros’ (lizard).
9. Idea – From Greek ‘idea’ (form, pattern).
10. Idealism – From Greek ‘idea”
11. Ideology – From ‘idea’ and ‘logos’ (word, study).
12. Ideogram – From ‘idea’ and ‘gramma’ (letter).
13. Idiom – From Greek ‘idioma’ (peculiar phrase).
14. Idiomatic – From ‘idioma’.
15. Idiopathy – From ‘idios’ and ‘pathos’.
16. Idiopathic – From ‘idios’ and ‘pathos’ (suffering).
17. Idiosyncrasy – From ‘idios’ (own, private) and ‘synkrasis’ (temperament).
18. Idiot – From idiotis (private)
19. Idol – From Greek ‘eidolon’ (image, phantom).
20. Idolatry – From ‘eidolon’ and ‘latreia’ (worship).
21. Igneous – From Greek ‘ignis’ (fire).
22. Ileum – From Greek ‘eilein’ (to twist).
23. Iliad – Epic poem, from ‘Ilios’ (Troy).
24. Ilium – Upper part of the pelvis, from Latin ‘ilium’, but influenced by Greek ‘ile’.
25. Icon – From Greek ‘eikon’ (image, likeness).
26. Iconoclast – From ‘eikon’ and ‘klastes’ (breaker).
27. Idiopathy – From ‘idios’ and ‘pathos’.
28. Ischemia – From ‘ischaimos’ (stopping blood).
29. Isobar – From ‘isos’ (equal) and ‘baros’ (weight).
30. Isochronous – From ‘isos’ and ‘khronos’ (time).
31. Isocracy – From ‘isos’ and ‘kratos’ (power).
32. Isokinetic – From ‘isos’ and ‘kinesis’ (movement).
33. Isolation – From Greek ‘isolein’ (to make solitary).
34. Isosceles – From ‘isos’ and ‘skelos’ (leg).
35. Isotope – From ‘isos’ and ‘topos’ (place).
36. Isothermal – From ‘isos’ and ‘therme’ (heat).
37. Isometric – From ‘isos’ and ‘metron’ (measure).
38. Isoenzyme – From ‘isos’ and ‘enzyme’.
39. Irony – From Greek ‘eironeia’ (dissimulation).
40. Ironic – From Greek ‘eironeia” (dissimulation)
41. Iris – From Greek ‘iris’ (rainbow).
42. Isthmus – From Greek ‘isthmos’ (neck).