I recently found out that the word wife is pronounced differently in the following examples:
wife [waif] / midwife [midwaif] / but midwifery [ˈmɪdˌwɪfərɪ]
This appears to be another inconsistency of English phonetics. Does anyone know why this is?
Alexander Ellis† claims that the modern pronunciation [midwaif] is “orthographical”:
Though the pronuncitation ['mɪdɪf] (in modern notation) is ignored by most old dictionaries, it is acknowledged here and there. Routledge's Pronouncing Dictionary of the English Language, 1867, gives two pronunciations, “mid′wif, or mid′wīf ”, and Walker, Critical Pronouncing Dictionary, 1791, gives
And “144” refers to this note:
OED 1 (1906) says “the colloquial pronunciation (mi⋅dif) is now seldom heard.”
It appears that at least by Modern English the secondary stress on the second syllable of midwife had been reduced in non-educated speech to non-stress. This may have been the case even earlier, since Middle English spellings indicate that a variant was then current with the same connective vowel between the first and last syllables which gave rise to the /ɪf/ pronunciation in housewife and goodwife. Alternately, the reduction may have come about by analogy with housewife and goodwife.
“Polite” usage eventually succeeded in stamping out the “vulgar” pronunciation of midwife; but it may be suspected that ['mɪdɪfrɪ] was acceptable under the principle of trisyllabic laxing.
† Prototype of Shaw's Henry Higgins and inventor of the IPA characters ʃ and ʒ (along with several other notations which have not survived)