English Phonetics with Columbo: Yod-dropping and Yod-coalescence

Have you ever wondered why Columbo says nOOz and not nJOOz? (No.)

Or assOOmed and not assJOOmed?

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This is what we call "yod-dropping".

Why this weird name?

"Yod" is the Hebrew word for the letter "yod" that contains the consonant sound /j/.

OK, so it's basically the dropping of the sound /j/ after another consonant.

But we don't say "ExcOOse me". Something's wrong, right?

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In General American, yod-dropping occurs after interdental and alveolar consonants.

Interdental sounds are /θ/ and /ð/.

Alveolar consonants are: /n/, /t/, /d/, /s/, /z/, and /l/.

That's it. These are the sounds that allow yod-dropping. (No /k/ from "Excuse me", see?)

"I have absolute proof, sir."

 /ˈæb.sə.luːt/

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"Mr. Lewis Lacy."

 /ˈluː.ɪs/

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"We found this newspaper in the motel room."

/ˈnuːzˌpeɪ.pɚ/

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"I'm gonna sue you [...]"

/suː/

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This is why in the word "few" we can't say "fOO" instead of "fJOO". The sound /f/ is labial. Labials are not welcome here.

Listen to Columbo's "a few questions":

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(Noticed "sOO" for "sue", by the way?)

Same goes for velar sounds.

"We could speculate all day [...]"

/ˈspek.jə.leɪt/

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"This is an amusing theory, Lieutenant."

/əˈmjuː.zɪŋ/

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And why not /tʃ/, for example?

Some sounds already contain the /j/ element.

/tʃ/ is the sum of /t/ + /j/.

/dʒ/ is the sum of /d/ + /j/.

/s/ + /j/ = /ʃ/

/z/ + /j/ = /ʒ/

Oh, this, by the way, is yod-coalescence. The merging of the /j/ sound with the preceding consonant.

Listen to the /tʃ/ sound in "Congratulations, is that it?":

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"Why did you look?"

/dɪd jʊ/ > /dʒ/

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"How do you know?"

/d jə/ > /dʒ/

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"'Cause you k0lled the witness."

/kɑːz jʊ/ > /ʒ/

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What about the post-alveolar /r/ in "withdrew"?

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Short answer: it's physically hard to pronounce "drjew" so why bother.

Same here:

  1. after /ʃ/, /tʃ/, /dʒ/ > It's "shoes", not "shjews",
  2. after /j/ (how'd we merge two j's?),
  3. after stops (p, t, k, b, d, g) + /l/ > It's "blue", not "bljew".

But...

Why would we need to add /j/ at all?

Well, in Middle English, there were four sounds /yː/, /iw/, /ew/ and /ɛw/ that later in the same period became /ɪw/ (/ɛw/ is lazy, /ɛw/ is still /ɛw/.)

Then, in Modern English, both /ɪw/ and /ɛw/ merged into the diphthong (two sounds) /ɪw/. This is a falling diphthong, which means the melody is eeeew. Not ewwww. The /ɪ/ sound is stronger.

Later on, the falling /ɪw/ (eeeew) diphthong became /juː/, a rising diphthong: joooo. Not jjjju.

(Please tell me it makes sense.)

Which leaves us with /juː/ as the realization (pronunciation) of these letter combinations:

<eu> (feud),

<ew> (newspaper),

<ue> (sue),

<ui> (suit),

<u consonant+vowel> (assume).

Easy, isn't it?

Oh, and just one more thing.

There won't be any droppings in words like "venue" /ˈven.juː/ where "j" is the first letter of the syllable that precedes "eligible" consonants, like the alveolar "n". It's not venOO.

Now we're good!

I hope this was useful. Get yourself some chili, put on an episode, and make pauses when you notice any "yod" stuff.