Sorry, no online dictionaries contain the exact phrase difficult to penetrate.
Did you mean:

Reverse dictionary results:
1. unfathomable
 2. murky
3. deep
4. dense
5. abstruse
6. recondite
7. rough
8. bite
9. break
10. hard
 11. profound
12. subtle
13. run
14. stick
15. runs
16. cut
17. cuts
18. depth
19. drive
20. fathom
 21. impenetrable
22. keen
23. penetrant
24. penetration
25. penetrative
26. pick
27. pound
28. pounded
29. probe
30. smite
 31. access
32. accessibility
33. arcane
34. arduous
35. argue
36. barnacle
37. beat
38. beats
39. bottomless
40. boyg

More reverse dictionary results >>

You can look up the words in the phrase individually using these links:   difficult ?   to ?   penetrate ?
(A question mark next to a word above means that we couldn't find it, but clicking the word might provide spelling suggestions.)

Not helpful? You might try using the wildcards * and ? to find the word you're looking for. For example, use
diff*to search for words beginning with diff, or
*rateto search for words ending with rate
You might also try these searches: Google, News, Images, Wikipedia, Reddit, BlueSky



Home   Reverse Dictionary / Thesaurus   Datamuse   Word games   Spruce   Feedback   Dark mode   Random word   Help


Color thesaurus

Use OneLook to find colors for words and words for colors

See an example

Literary notes

Use OneLook to learn how words are used by great writers

See an example

Word games

Try our innovative vocabulary games

Play Now

Read the latest OneLook newsletter issue: Threepeat Redux