According to the French orthography page on Wikipedia, -om becomes ɔ̃ before a consonant (m in this case). So why is ɔ̃ not allowed? Is it because of some syllable breakdown rule that I am not aware of or is it because while m is technically a consonant, the French orthography rule doesn't treat it like one?
2 Answers
This is French. Rules have exceptions. A vowel followed by N or M which is followed a different consonant or at the end of the word becomes a nasal vowel. There are a few exceptions: -mn
does not lead to nasalization, the final -um
(or -ums
) is pronounced /ɔm/, recent imports from foreign languages are not nasalized, and probably a few more I can't think of right now.
A double consonnant does not nasalize the preceding vowel except in the few cases where it does. The only exception I can think of is when the prefix -en
was added to a word beginning with n
or m
(in the latter case, the word is spelled emm-
), with some fluctuation when en-
was derived from the Latin prefix in-
. Here are a few examples which are nasalized:
ennui /ɑ̃.nɥi/
enneigé /ɑ̃.nɛ.ʒe/
emmener /ɑ̃.mə.ne/
remmener /ʁɑ̃.mə.ne/
But in other words the usual rule applies (e
+ double consonant is pronounced with an open /ɛ/ (è sound), occasionally a closed /e/ (é sound)):
ennemi /ɛ.nə.mi/
renne /ʁɛn/
flemme /flɛm/
emmental /ɛ.mɛ̃.tal/ or /e.mɛ̃.tal/
Emmanuelle /ɛ.ma.nɥɛl/ or /e.ma.nɥɛl/
Also emm
is pronounced /am/ in femme and in adverbs that end in -emment
.
-
A few other ones: emmagasiner, emmailloter, emmancher, emmerder, emmitoufler, emmurer, emmener, emménager, emmêler, ennoblir– jlliagreCommented May 23, 2021 at 14:55
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Notice that there are regional variants. For instance in Languedoc, année is pronounced /ɑ̃.nɛ/.– wazooxCommented May 27, 2021 at 17:02
This is the expected pronunciation, along with [co.mɑ̃.dɑ̃] and variations in the way /ɑ̃/ is realized.
Most nasal vowels directly followed by a nasal consonant (i.e. N or M) lost their nasality several centuries ago.
There are rare regional exceptions (See How is /a/ pronounced before n/m in French?) and a few other ones, as Gilles rightly pointed out in his answer.