The Adûnaic t-series of homorganic consonants included the velar consonants. They were mostly survivals of the Primitive Adûnaic k-series (SD/418). In Adûnaic, the consonant “y” (IPA [j]) was abnormal as the sole survivor of the primitive palatal c-series. Rather than define a series with a single consonant, the discussion here groups [j] with the velars, as Tolkien did with many of his other languages.