40 hard tongue twisters, ranked from tricky to nearly impossible

Most "hard tongue twister" lists are padded with things like Peter Piper. Peter Piper is not hard. You've said it since you were six.

This list is ranked by what actually breaks people — based on which sound pairs collide. The further down you go, the worse it gets. Test yourself honestly: record one and let the AI tell you your speed and how many sounds you smeared. Most people who "nailed it" find out they didn't.

Level 1: warm-up hard (say each 3× fast)

1. Truly rural.
2. Toy boat.
3. Irish wristwatch, Swiss wristwatch.
4. Greek grapes, great grapes.
5. Six sticky skeletons.
6. Flash message.
7. Willie's really weary.
8. A snake sneaks to seek a snack.

Two-word twisters look easy and aren't. "Truly rural" forces your tongue through four R/L switches in six syllables — the exact pair that R drills exist for.

Level 2: properly difficult

9. The thirty-three thieves thought that they thrilled the throne throughout Thursday.
10. Lesser leather never weathered wetter weather better.
11. Fred fed Ted bread, and Ted fed Fred bread.
12. Six sleek swans swam swiftly southwards.
13. Brisk brave brigadiers brandished broad bright blades, blunderbusses, and bludgeons.
14. A loyal warrior will rarely worry why we rule.
15. Wayne went to Wales to watch walruses.
16. Can you can a can as a canner can can a can?
17. Rory the warrior and Roger the worrier were reared wrongly in a rural brewery.
18. Thin sticks, thick bricks.
19. Fresh French fried fly fritters.
20. Green glass globes glow greenly.

Level 3: the ones that end careers

21. The sixth sick sheikh's sixth sheep's sick.
22. Pad kid poured curd pulled cod.
23. The seething sea ceaseth and thus the seething sea sufficeth us.
24. Amidst the mists and coldest frosts, with stoutest wrists and loudest boasts, he thrusts his fists against the posts and still insists he sees the ghosts.
25. Imagine an imaginary menagerie manager managing an imaginary menagerie.
26. Six Czech cricket critics.
27. Peggy Babcock. (Five times. Go.)
28. A proper cup of coffee from a proper copper coffee pot.
29. She stood on the balcony, inexplicably mimicking him hiccuping, and amicably welcoming him in.
30. Supposed to be pistachio, supposed to be pistachio, supposed to be pistachio.

Number 21 is widely cited as the hardest sentence in the English language — S, K, SH, and TH alternating with no room to reset. Number 22 was built in a lab: MIT speech researchers designed it in 2013, and some volunteers just stopped mid-phrase.

Level 4: long-form endurance

31. Betty Botter bought some butter, but she said the butter's bitter. "If I put it in my batter, it will make my batter bitter. But a bit of better butter will make my batter better." So she bought a bit of butter, better than her bitter butter, and she put it in her batter, and the batter was not bitter.
32. A tutor who tooted the flute tried to tutor two tooters to toot. Said the two to the tutor, "Is it harder to toot, or to tutor two tooters to toot?"
33. Mr. See owned a saw and Mr. Soar owned a seesaw. Now See's saw sawed Soar's seesaw before Soar saw See.
34. If one doctor doctors another doctor, does the doctor who doctors the doctor doctor the doctor the way the doctor he is doctoring doctors? Or does the doctor doctor the way the doctor who doctors doctors?
35. How much wood would a woodchuck chuck if a woodchuck could chuck wood? He would chuck, he would, as much as he could, and chuck as much wood as a woodchuck would if a woodchuck could chuck wood.
36. Ned Nott was shot and Sam Shott was not. So it is better to be Shott than Nott.
37. I thought a thought. But the thought I thought wasn't the thought I thought I thought.
38. Whether the weather is warm, whether the weather is hot, we have to put up with the weather, whether we like it or not.
39. Luke Luck likes lakes. Luke's duck likes lakes. Luke Luck licks lakes. Luke's duck licks lakes.
40. Through three cheese trees three free fleas flew. While these fleas flew, freezy breeze blew.

The last two are Dr. Seuss (Fox in Socks ends with a warning label for a reason). Long twisters test something different from short ones — not raw speed, but whether your articulation survives fatigue. That's what makes them closer to real speaking: a presentation is 20 minutes, not two words.

Why these break your mouth

Your brain plans speech in overlapping chunks. When two sounds share most of their mouth position but not all of it — S and SH, R and L, F and TH — the plans interfere, and the wrong one wins. Linguists found the errors aren't random: under pressure your mouth produces sounds between S and SH. You can't hear it happening. A recording catches it instantly, which is exactly what the tongue twister test measures — clarity per sound, not just speed.

FAQ

What is the hardest tongue twister in the world? For English, two candidates: "the sixth sick sheikh's sixth sheep's sick" (traditional) and "pad kid poured curd pulled cod" (MIT, 2013). The first is harder to say; the second is harder to say repeatedly.

Why can some people say them easily? Practice, mostly — actors and broadcasters drill these. Native language matters too: if your first language distinguishes R/L or S/SH aggressively, those pairs cost you less.

Does saying them fast matter? Speed without clarity is noise. Aim for clean-at-speed: three repetitions, no smeared sounds. Then push the tempo.