Several fossilizations of Old Japanese grammatical elements remain in the modern language – the genitive particle "tsu" (superseded by modern "no") is preserved in words such as "matsuge" ("eyelash", lit. "hair of the eye"); modern "mieru" ("to be visible") and "kikoeru" ("to be audible") retain what may have been a mediopassive suffix -"yu(ru)" ("kikoyu" → "kikoyuru" (the attributive form, which slowly replaced the plain form starting in the late Heian period) > "kikoeru" (as all shimo-nidan verbs in modern Japanese did)); and the genitive particle "ga" remains in intentionally archaic speech.