> English has an astonishing ability to replace vowels with schwas That only works with the unstressed vowels [1], so we have "phətogrəphy" because "to" is a f

> English has an astonishing ability to replace vowels with schwas That only works with the unstressed vowels [1], so we have "phətogrəphy" because "to" is a full stress and "phy" is a half stress. [1] Except in NZ English, where the ɪ-sound ("i" as in "if") and schwa (ə) are pronounced the same.