This word is tricky: sixth

Do you pronounce the full six sound and then add the th sound? I find that very difficult especially when talking fast. Surely there must be a shortcut... right? How do you transition from the x to the th?

  • In BrE it is often "sikth". As for AmE, Merriam-Webster gives four pronunciations - \ ˈsiks(t)th , ˈsiks(t) \ - so, as you can see, M-W considers it standard to pronounce it identically to "six" ( merriam-webster.com/dictionary/sixth ).
    – rjpond
    Commented Sep 13, 2017 at 21:36

9 Answers 9


As a native speaker, I definitely say the whole consonant cluster as written, even in very fast speech ( i.e. /siksθ/ in IPA).

I tried saying it to myself out loud just now omitting the second s sound, so /sikθ/, and it sounded really strange, like I was trying to make fun of someone with a lisp saying the number six. I would not recommend that shortcut.

On the other hand I tried /sikst/ and found it inoffensive (and hard to notice a difference), so I would recommend that if you find /siksθ/ hard to produce.

  • should add -- I am an American. I think I have never heard /sikθ/, but I have been surprised before on these pages.
    – hunter
    Commented Jan 23, 2014 at 14:53
  • so, do you think most americans pronounce the whole consonant cluster?
    – Vic
    Commented Jan 24, 2014 at 14:25
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    It definitely sounds like the word I hear the most, yes
    – hunter
    Commented Jan 24, 2014 at 14:39

As a native English speaker, I say "Sick-th".

  • 4
    I guess it has something to do with speed, but also different people say it differently. I always say 'sick-th' but now that I think about it, I can think of some people saying 'sicks-th' (basically 'six-th'). Commented Jan 22, 2014 at 20:42
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    @Downvoter, could you explain why please? Commented Jan 22, 2014 at 20:46
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    I didn't downvote this answer, but I've never heard anyone say "sick-th," and after trying it out myself I think I would have a hard time recognizing it as the word "sixth."
    – phenry
    Commented Jan 22, 2014 at 22:06
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    I say sick-th too. I come from the south of England (though I don't live there now). I thought everyone said sick-th to be honest. I'll try getting a few people with different accents to say it and I'll listen closely to the result! Commented Jan 23, 2014 at 10:40
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    I think @MdMazzotti's comment solves the problem. This is probably a case of USA vs Britain again, hunter says he's an American and pronounces it like the American version on TFD, yet starsplusplus and I both pronounce it without the second "s". Commented Jan 25, 2014 at 12:38

(From OP)
This word is tricky: sixth
Do you pronounce the full six sound and then add the th sound?
I find that very difficult especially when talking fast.
Surely there must be a shortcut... right?

When talking fast, it is common (though not universal) for native english speakers to pronounce both sixth and sixths as /siks/ (same as "six").

So to answer OP, the consonant cluster xth and xths is difficult to pronounce and many native speakers take the shortcut of simply saying /siks/.

Some native speakers are shocked at this. They'll even "prove it to themselves" by pronouncing it and concluding they say sixth as /siksθ/. However, native speakers are not always the best at guiding you to common pronunciations because they underestimate the wide variety of ways we merge and simplify words when talking. Be sure to listen to "what they say" more than "what they tell you they are saying!"

Example: "What do you want to drink?" can be, "wahdy ah wanna drin?" with no pause between words.

From "The Cambridge English Pronouncing Dictionary" (Google Books, Cambridge.org):
The fricative /θ/ is also frequently lost in clusters in rapid speech. Examples: ‘sixth place’
/siksθpleis/ (careful speech)
/sikspleis/ (rapid speech)

Also, see other stack exchange answers:

  • Very inteesting! Good post!
    – rogermue
    Commented Jan 31, 2014 at 14:24

From a non-native speaker's perspective whose first language has no th sounds and there's no such thing as a long consonant string (for example, "I asked Steve yesterday ...", which requires you to pronounce [s-k-t-s-t]), I can imagine what you're struggling with.

The sequence [k-s-th] (as in sixth) is rare indeed. I don't know if you have a similar problem with other sequences such as [f-th] in fifth, [t-th] in eight, and [n-th] in ninth.

However, the sequences of [z-th] and [t-s-th] (they're different /th/ sounds, but you get the idea) are common in English speech. And you might need to perfect those first. If you feel comfortable with those two, I believe that you wouldn't find it difficult anymore.

Some common expressions of the [z-th] sequence: He's the ..., She's the ....

Some common expressions for the [t-s-th] sequence: It's the ..., That's the ..., What's the ...?

  • 1
    That's a good point. If you can say the two words: "six the" together, then you can pronounce sixth- just say "six the" without the final schwa.
    – Jim
    Commented Jan 25, 2014 at 3:26

I can't seem to find a suitable way to describe how I pronounce "sixth" using IPA. Perhaps someone who's more adept with IPA can help with that.

A little introduction:

When we put together sounds, like the "ks" of "x", we generally have to use different (active) mouth parts for each sound, otherwise they won't work. The active mouth parts would be the lips, the teeth, the tip of the tongue, the back of the tongue, the epiglottis and finally the glottis, in that order from front to back.

The "k" sound uses the back of the tongue to hit the velum (hence "velar stop"), and can easily go with "s", which uses the tongue and teeth, the two together forming the "x" sound. On the other hand, both "s" and "θ" use both the tongue and teeth, and as such don't really work together in general, since neither teeth nor tongue can be in multiple positions at the same time. There are a few ways to pronounce either, however general descriptions of the pronunciations could be written as follows:

s is pronounced when air is made to flow through a small space between teeth, tongue and or alveolar.

θ is pronounced when air is forced out over the tongue which is pressed on or placed near to the top teeth, either under or behind (or if you want to be a little silly, in front).

  • (I can't say for sure, but it seems in British English it is usually behind, whereas in American or Caribbean English, it is usually under)

Despite this, although it is impossible to make the two distinct "s" and "θ" sounds together, I find I use a sound that can be considered in between the two when I say "sixth". In order to do so, simply press (not touch) your tongue behind your top teeth near to or touching the alveolar (the part where your teeth meet your back gum), and push the air over the tongue (you should feel the air on your back gums and tip of tongue, not around the sides). This sound, at least to me, is close enough to both "s" and "θ" to be used here.

Diagram 1 of Mouth. Location to place tongue highlightedDiagram 2 of Mouth. Configuration of tongue Fig.1 Location to place tongue highlighted    |    Fig.2 Configuration of tongue


I daresay there are several strategies; I know there are dialects where /sɪkst/ is standard in any environment.

Myself, in ordinary speech, I just say /sɪks/ if there's no following vowel to liaise with, or /sɪksθ/ if there is, with /sθ/ as the onset of the following syllable.

  • Is /sɪks/ the same pronounciation as "six"? Commented Jan 23, 2014 at 10:43
  • @starsplusplus Yes. Commented Jan 23, 2014 at 13:00
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    That's not really a pronounciation of "sixth" then; you're saying an entirely different word. Commented Jan 23, 2014 at 13:31
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    @starsplusplus Not at all; it's an elided form of sixth in exactly the same way as “a”, pronounced /ə/, is an elided form of have in “woulda”. Commented Jan 23, 2014 at 14:11

It is supposed to be six and then the th sound. It is a little difficult to pronounce so, certain people will say it as sick and then the th sound, turning it into sickth.

This link has pronunciation symbols as well as, sound recordings of it being pronounced http://dictionary.cambridge.org/dictionary/british/sixth_1?q=sixth#

  • 2
    It's not "supposed to be" anything. Different dialects and accents will produce different sounds; that's one of the many joys of English. Commented Jan 23, 2014 at 0:26
  • Agreed. You could improve your answer by changing it to be "six and then the th sound is a little difficult to pronounce..." which removes the implication that there's one correct way to speak. Commented Jan 23, 2014 at 10:42
  • stackUnderflow, I am aware that sounds can be pronounced differently. That is why I mentioned it in my answer.
    – Tristan
    Commented Jan 23, 2014 at 13:10
  • Sixth includes the word six so, it is supposed to be six and then the th sound.
    – Tristan
    Commented Jan 24, 2014 at 16:59

I'm from New Zealand and love watching on TV, documentaries about Royalty. Beautiful, well spoken English accents who pronounce "sixth" as "sickth".
Edward sickth, George the sickth, etc. I find it so strange that the presenters who speak (to my ears) the Queens English, don't seem to be able to say sixth... six with a th on the end.


I am a native born Englishman and have always heard and said six-th until recently when I heard some BBC news readers saying sickth. I suppose it will take over as it's easier to say.

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