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- noun linguistics The act or process of
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Regarding the above example, we have no way of knowing whether or not Grimm's law was preceded in Germanic by a brief period of pharyngealization that ended before it could affect any other sound changes.
Pharyngealized stops, not ejective ones, were the norm in neighbouring West Semitic languages of the Minoan period, such as in Ugaritic read Zemánek, The origins of pharyngealization in Semitic, page 4.
Would the pharyngeal have caused the nasalization (I've read nasalization may develop from pharyngeals and pharyngealization diachronically), or was it the PSem final *-m via regressive assimilation (and subsequent loss of the segment itself), or was the vowel in the second syllable syncopated and the newly arisen cluster metathesized (of course, with the necessary devoicing of *b)...
I can't really think why would pharyngealization cause voicelessness.
I may be off track here but it seems to me that what these three environments have in common is the fact that modifications of the vocal tract brought about by pharyngealization and nasalization both have the effect of expanding the size of the resonance chamber thus lowering the frequency of the vowel.