Middle english period

In the ME period a great change affected the entire system of vowel phonemes. OE had both short and long vowel phonemes, and each of these could occur in any phonetic environment, that is, they were absolutely independent phonemic units. As a result of important changes coming into the vowel system in the 10th-12^th centuries, the ME vowel system was basically different. While in OE quantity (length/shortness) was a distinctive phonemic feature, in ME (by the 13^th c.) quantity of vowels becomes dependent on their environment, exactly on what follows. In some phonetic environments only short vowels can appear, while in others only long vowels can appear. Thus quantity is no longer a phonemically relevant feature and becomes a merely phonetic peculiarity of a vowel sound. Let’s consider the changes that took place during the ME period.

Word Stress

During the MdE period stress acquired greater positional freedom and began to play a more important role in word derivation. It was caused by phonetic assimilation of thousands of loan-words adopted during this period. New accentual patterns are found in numerous MdE loan-words from French. Probably, when they first entered the English language they retained their original stress on the ultimate or penultimate syllable. This kind of stress could not last long. Gradually, as loan-words were assimilated, the word stress was moved closer to the beginning of the word in line with the English (Germanic) system. This shift is accounted for by what is known as the ‘recessive tendency’ In disyllabic words the accent moved to the first syllable in conformity with the pattern of native words. In words of three and more syllables the shift of the stress could be caused by the recessive tendency and also by ‘the rhythmic tendency’, which required a regular alternation of stressed and unstressed syllables. Under the rhythmic tendency, a secondary stress could arise at a distance of one syllable from the original stress: reco`mmendan – recommend. In many polysyllabic words both tendencies; the recessive and the rhythmic operated together and brought about several changes. For example, in MnE consolation we find the results of the shift from the final to the preceding syllable [lei] due to the recessive tendency and a secondary stress on the first syllable. Sometimes the shifting of the word stress should be attributed to certain morphological factors. Thus prefixes of many verbs were not stressed in accordance with the OE tradition while corresponding nouns received the stress on the first syllable: present –pre-sent. This example shows that the role of word accentuation has grown; word stress performs a phonological function as it distinguishes a verb from a noun. The position of word stress became relatively free and its phonological application has widened: it can be shifted in word derivation, though it is never moved in building grammatical forms.

Vowel Changes in MdE and Early MnE Unstressed vowels

Levelling of unstressed vowels: all unstressed vowels were as a rule weakened and reduced to a neutral vowel, which was denoted by the letter –e. Thus, the infinitive suffix – an was reduced to –en: tellan – tellen, in a similar way: sunu – sune, sone. This weakening of unstressed vowels is closely connected with developments in declension and conjugation. From the 13^th c. onwards, some dialects showed certain vacillation in spelling unstressed vowels, which probably reflected peculiarities of pronunciation: askid, stonus.