1. debilitating (adj.), debilitation (n.), debilitate (v.) يضعف incapacitating, weakening
AIDS is a debilitating disease.
2. defective (adj.), defect (n.) فيه خلل أو عيب faulty, imperfect, flawed
A defective heart valve can lead to health problems.
3. defend (v.), defense (n.) يدافع عن to say or to write something to support somebody or something
Although everyone said Faisal was wrong, he defended his answer to the question.
4. deficiency (n.) نقص lack of
He suffered from a deficiency of vitamin A.
5. definite (adj.) واضح clear; easy to see or notice
There was a definite change in the liquid after the catalyst was added.
6. degenerative (adj.), degenerate (v.), degeneration (n.) مخل worsening (without hope of improvement), deteriorating
Huntingtons disease is a degenerative disease.
7. depression (n.), depress (v.), depressed (adj.) اكتئاب dejection, gloom
He suffered from depression because of the death of his child.
8. deranged (adj.) مشوش abnormal in appearance
The cells had become deranged and no longer resembled the parent cell.
9. derive (v.) يشتق to come from
The main ingredient in the painkiller is derived from a common plant.
10. detect (v.), detection (n.) يكتشف identify, discover
Researchers have not detected the cause of autism.
11. devastate (v.), devastation (n.), devastated (adj.) مهجور crush, desolate
The bad news devastated his mother.
12. dimension (n.) بعد measurement (e.g., length, height)
What are the dimensions of the new building?
13. discover (v.), discovery (n.) يكتشف learn, determine, detect
Scientists have discovered that a mutant gene causes the disease.
14. disparity (n.) اختلاف difference
Most new cells failed to develop; however, new cells in the hippocampus did mature. This disparity may be because they are needed there.
15. dissipate (v.) يشتت scatter; make disappear; disintegrate; dissolve
Drinking a lot of water dissipates the toxin.
16. dissolve (v.) يذوب to make something solid become part of a liquid by putting it in a liquid
Sugar dissolves in water.
17. distorted (v.), distortion (n.) distorted (adj.) يشوه change so that something appears unnatural
The chemical distorted the natural shape of the object.
18. distribution (n.), distribute (v.) توزيع location, dispersal
The map shows the distribution of AIDS cases throughout the world.
19. divide يقسم (v.), division (n.), divided (adj.) separate, split
They divided the work among themselves.
20. dizzy (adj.), dizzily (adv.), dizziness (n.) مصاب بدوار
The heat made me dizzy.
21. dome (n.), domed (adj.) قبة a shape like a ball cut in half
The object was shaped like a dome.
22. donor (n.), donate (v.) مانح giver, supplier
I hope there will be a kidney donor.
23. droplet (n.) قطرة صغيرة جداً drop, bead, globule, drip
The technician placed a droplet of blood on the glass slide.
24. early (adj.) مبكرا initial
Early signs of measles are fever and runny nose.
25. effect (n.) أثر a change that is caused by something
The effect of the diet was weight loss.
26. embed (v.) يغرز به بإحكام to fix something deeply and firmly in something else
A piece of glass was embedded in the wound.
27. enable يمكن - يخول (v.) allow, facilitate, permit, make possible
Studying the vocabulary words enables students to pass the vocabulary test.
28. enlarge (v.), enlargement (n.), enlarged (adj.) يكبر - make bigger, increase, expand
I asked the man to enlarge the photograph to a bigger size.
29. entire (adj.), entirely (adv.) كامل whole, complete, total
I completed the entire task in less than one hour.
30. equipment (n.) معدات (n.) (This noun is always singular.) tools, utensils, apparatus
The equipment included a Bunsen burner, tube, and beaker.
31. eradicate (v.), eradication (n.) يستأصل eliminate, get rid of, wipe out
Smallpox has almost been eradicated.
32. essential (adj.) أساسي vital, crucial, critical
Treatment is essential if a patient is to recover from bubonic plague.
33. evaporate (v.), evaporation (n.), evaporated (adj.) يتبخر if a liquid evaporates or if something evaporates, it changes into steam; if a feeling evaporates, it slowly disappears
The water evaporated into hot steam.
Hope of reaching an agreement is evaporating.
34. exaggerated (adj.) متضخم larger than normal, overly large
The hematoma was exaggerated in size.
35. execute (v.) ينجز carry out, perform
The vocal cords execute a series of well-coordinated movements during swallowing.
36. exhibit (v.) يبدو show, display, demonstrate
He exhibited signs of paranoia.
37. expansive (adj.), expanse (n.) متمدد vast, extensive, sizeable, large
The room was expansive.
38. extraordinary (adj.) غير مألوف unexpected, unusual
Winning $1 million was extraordinary.
39. extraordinary (adj.) غريب strange, odd
It was extraordinary that he didnt know his own brothers name.
40. extraordinary (adj.) استثنائي special, exceptional, remarkable
The discovery of the new star in the solar system was extraordinary.
41. facilitate (v.) يمكن enable
A gastroscope is an instrument that enables exploration of the upper gastric tract.
42. fatigue (n.) إرهاق exhaustion, weariness
Because of fatigue, the woman fell asleep immediately after she went to bed.
43. feature (n.) ميزه characteristic, trait, aspect, symptom
One feature of the disease is trembling.
44. fidget (v.), fidgety (adj.) متململ move around restlessly
The little boy fidgeted in his chair.
45. filtered (adj.), filtration (n.), filter (v.) يصفي
The filtered water did not contain foreign matter.
46. flake (n) قشارة - a very small flat thin piece that breaks away easily or has been broken away from something else
The maid used soap flakes to wash the sweater.