Proto-IE: *(a)merg'-
Meaning: rot, sediment; rotten
Old Greek: amórgǟ f. `Ölhefe', amórgǟ-s, ámorgo-s, ámorgi-s m. `id.'
Celtic: *merg- > OIr meirc `Rost; Runzel', bol mergach `uter rugosus', Ir meirg `Rost; Runzel', meirgeall `Rauhheit'; Cymr merydd `faul, träge; debilitas', merddwfr `Brakwasser', OBret mergidhaam `hebesco'
Russ. meaning: гниль, осадок; гнилой
References: WP II 281 f (different in Pok.)