e/Slavic liquid metathesis and pleophony

Information
has gloss	eng: Slavic liquid metathesis refers to the historical phenomenon of metathesis of liquid consonants occurring in Common Slavic period in South Slavic and Czecho-Slovak area. Onomastics evidence indicates that it seems to have occurred sometimes in the latter half of the eighth century. Closely-related corresponding phenomenon of pleophony occurred parallelly in East Slavic languages.
lexicalization	eng: Slavic liquid metathesis and pleophony
instance of	c/Sound laws