Sorry, no online dictionaries contain the exact phrase penetration effect.
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Reverse dictionary results:
1. enter
2. profound
3. deep
4. impervious
5. into
6. saturation
7. burning
8. acumen
9. breakthrough
10. depth
11. discrimination
12. entering
13. entry
14. fathom
15. infiltration
16. inroad
17. insight
18. penetrative
19. profoundly
20. proof
21. sagacious
22. shed
23. shell
24. soft
25. subtle
26. wound
27. acute
28. interpenetration
29. introducing
30. permeation
31. sex
32. twilight zone
33. waterproof
34. agent-in-place
35. bulletproof
36. dimethylsulphoxide
37. germproof
38. radiopaque
39. infect
40. injection

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You can look up the words in the phrase individually using these links:   penetration ?   effect ?
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