>>>>>>> How have you been pronouncing the following words?
>>>>>>> Tube, tuba, tuberculosis
>>>>>>> Impromptu, In situ,
>>>>>>> Petunia, Petula Clark
>>>>>> They are all "too" to this American, except "in situ", which has "choo"
>>>>>> as in "situation". In general, it seems to me that tu > [tS@] in
>>>>>> unstressed syllables (cf. natural, congratulate), but "tuberculosis" is
>>>>>> a conspicuous exception, perhaps because the t begins a word.
>>>>> How about "mature"? And "stupendous"? I think my rule is that
>>>>> it's /tu/ in the first syllable and /tS@/ elsewhere.
>>>>> Except when the "tu" isn't the first syllable because of a prefix, such
>>>>> as "intubation /,Intu'beIS@n/.
>>>> And except "institute", etc. Back to the drawing board.
>>> Stress is relevant. Compare "constituent."
Every one of the "tu"'s in this article is "tyoo" for me (mainly
southern English with an admixture of New Zealand English and Scots).
>> Probably, but it's not the only relevant thing. Compare "institute"
>> to "ligature" /'lIg@tS@r/, with about the same stress pattern for me.
> Perhaps via French versus via Latin.
Not likely - if there were a relevant difference in etymology going
that far back, both sides of the pond would have preserved the
distinction. Instead it seems nobody has one: Americans mostly
drop the palatalization, otherE speakers don't. If there seem to
be inconsistencies in AmE, it's probably because the shift hasn't
finished yet.
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