COMMENT: Reconstructed for the PEC level. The original meaning was, perhaps, 'dark grey' or 'dark yellow' (in Lak. 'dark' > 'blind', which is a rather usual semantic development). The Lak. form contains an adjectival infix (going back to a suffix) -r-: murč̣i- < *mič̣rV- < *mīč̣V-rV-.
