Moscow

The story

1. Proto-Indo-European · derived from*mesg-“to plunge, dip”
2. Proto-Slavic · derived from*mosky
3. Old East Slavic · derived fromМосков-
4. English todayMoscow

Ultimately from Old East Slavic Москов- (Moskov-), originally referring to the Moskva River, probably from Proto-Slavic *mosky (“swamp, dampness, moisture”). Perhaps related to Czech moskva (“raw bread”), Slovak mozga (“puddle”), Polish Mozgawa, and more distantly Latvian mazgāt (“to wash, rinse”), Sanskrit मज्जति (májjati, “to sink”), Latin mergō (“to dive”), all from Proto-Indo-European *mesg- (“to plunge, dip”). Cognate with Russian промозглый (promozglyj, “dank”). Doublet of Moskva.