Proto-IE: *mōur-
Meaning: to flow, to ooze
Armenian: mōr ,Schmutz, Sumpf' (*mǝu-ri-?), mrur ,Bodensatz' (*murur)
Old Greek: mǖ́romai̯, aor. mǖ́rasthai̯ `Tränen vergiessen, in Tränen zerfliessen, jammern, klagen'
Russ. meaning: течь, сочиться
References: WP II 249 f