phonological rule
systematic formalization of a phonological process
Four hu
classification of Mandarin Chinese rimes, based on different glides before the central vowel of the final: kāikǒu, finals without a medial; qíchǐ, finals beginning with [i]; hékǒu, finals beginning with [u]; cuōkǒu, finals beginning with [y]
penultimate rule
phonological rule in Latin that words are stressed in the penult if it is heavy or, if the penult is light and there are at least 3 syllables, stressed in the antepenult