Therto he couthe endite and make a thing,
Ther couthe no wight pynche at his writyng,
was certainly not pronounced in ordinary speech with the same stress on the last syllable as is here demanded both by the rhythm and rhyme.
As a rule, however, the rhythmical accent in English coincides with the fourth kind of accent, the etymological or word-accent, which we now have to deal with, and in greater detail.
Just as the different words of a sentence are pronounced, as we have seen, with varying degrees of stress, so similarly the different syllables of a single word are uttered with a varying intensity of the force of the breath. One of the syllables of the individual word is always marked off from the rest by a greater force of tone, and these others are again differentiated from each other by subordinate gradations of intensity of utterance, which may sometimes be so weak as to lead to a certain amount of indistinctness, especially in English. In the Teutonic languages, the root-syllable, as the most important element of the word, and that which conveys the meaning, always bears the chief accent, the other syllables bearing accents which are subordinate to this chief accent. As the etymology of a word is always closely associated with the form of the root-syllable, this syllabic accent may be called the etymological accent. It naturally happens that this syllabic accent coincides very often with the syntactical accent, as the syntactical stress must be laid on the syllable which has the etymological accent.
The degrees of stress on the various syllables may be as many in number as the number of the syllables of the word in question. It is sufficient, however, for purposes of metre and historical grammar, to distinguish only four degrees of accent in polysyllabic words. These four degrees of syllabic and etymological accent are as follows: 1. the chief accent (Hochton, Hauptton); 2. the subsidiary accent (Tiefton, Nebenton); 3. the absence of accent, or the unaccented degree (Tonlosigkeit); 4. the mute degree, or absence of sound (Stummheit). These last three varieties of accent arise from the nature of the Teutonic accent, which is, it must always be remembered, a stress-accent in which the volume of breath is expended mainly on the first or chief syllable. The full meaning of these terms can most easily be explained and understood by means of examples chosen either from English or German, whose accentual basis is essentially the same. In the word, wonderful, the first syllable has the chief accent (1), the last has the subsidiary accent (2), and the middle syllable is unaccented (3). The fourth or mute degree may be seen in such a word as wondrous, shortened from wonderous. This fuller form may still be used, for metrical purposes, as a trisyllable in which the first syllable has the chief accent, the last the subsidiary accent, and the middle syllable is unaccented, though audible. The usual pronunciation is, however, in agreement with the usual spelling, disyllabic, and is wondrous; in other words, the vowel e which originally formed the middle syllable, has been dropped altogether in speech as in writing. From the point of view of the accent, it has passed from the unaccented state to the state of muteness; but may be restored to the unaccented, though audible, state, wherever emphasis or metre requires the full syllable. We have the line: ‘And it grew wondrous cold,’ for which we might have ‘The cold grew wonderous’. In other cases the vowel is retained in writing but is often dropped in colloquial pronunciation, or for metrical convenience. Thus, in Shakespeare, we find sometimes the full form—
why the sepulchre
Has oped his ponderous and marble jaws.
Hamlet, I. iv. 50.