English 'Dublin' comes from Old Irish Dubhlinn meaning 'black pool' — referring to a dark tidal pool at the confluence of the Poddle and Liffey rivers, with 'dubh' (black) tracing to PIE *dʰewbʰ- (deep, dark).
The capital and largest city of Ireland, situated on the east coast at the mouth of the River Liffey.
English 'Dublin' derives from Irish 'Dubhlinn' (modern spelling 'Duibhlinn'), meaning 'black pool' — from Old Irish 'dubh' (black, dark) and 'linn' (pool, lake). This referred to a dark tidal pool where the River Poddle met the Liffey. The Irish 'dubh' comes from Proto-Celtic *dubu-, from PIE *dʰewbʰ- (deep, dark). However, the city's official Irish name today is 'Baile Átha Cliath' ('town of the hurdled
Dublin has two names in Irish: the English-derived Dubhlinn ('black pool') and the official Baile Átha Cliath ('town of the hurdled ford'). They refer to two different geographical features — a tidal pool and a river crossing — that were near each other but not the same place. English kept one name; Irish officialdom chose the other.