(iv) In words of three syllables, the second syllable when long and following a long root-syllable with the chief accent, has, especially in the early stage of Old English, a well-marked secondary accent: thus, ǣ́rèsta, ṓðèrra, sémnìnga, éhtènde; the third syllable in words of the form ǽðelìnga gets the same secondary accent. This secondary accent can count as one of the four rhythmic accents of the line, e.g.
þā ǣ́réstan ǣ́lda cýnnes.Gū. 948.
sígefolca swḗg oð þæt sémnínga.Beow. 644.
Words of this class, not compounded, are comparatively rare, but compounds with secondary accent are frequent.
These second syllables with a marked secondary accent in the best examples of Old English verse mostly form by themselves a member of the verse, i.e. are not treated as simple theses as in certain compositions of later date, e.g.
dȳ́gelra gescéafta. Creat. 18.
ā́genne brðor.Metr. ix. 28.
(v) After a long root-syllable of a trisyllabic word a short second syllable (whether its vowel was originally short or long) may bear one of the chief accents of the line, e.g. bōcère, bíscòpe:
þǣr bíscéopas and bṓcéras. An. 607.