Slavic liquid metathesis and pleophony
（重定向自Polnoglasie）
Slavic liquid metathesis refers to the historical phenomenon of metathesis of liquid consonants occurring in the Common Slavic period in the South Slavic and Czecho-Slovak area. The closely related corresponding phenomenon of pleophony (also known as polnoglasie or full vocalization) occurred in parallel in the East Slavic languages. The change acted on syllables in which the Proto-Slavic liquid consonants *r and *l occurred in a coda position. The result of the change is dependent upon the phonological environment and accents, and varies among the Slavic languages; see below for details.