In Welsh morglawdd is the word for a tidal barrage (lit. “sea bank, dyke, earthwork or hedgerow”). I heard this word during a discussion on Radio Cymru of plans to build such a barrage across the Severn Estuary and I just liked the sound of it.

The plans are opposed by many environmental groups who prefer an alternative proposal to build an artificial reef or greigres artiffisial, which would cost less, produce more power, and would have less environmental impact.

There are more details of the project on the BBC website in English and Welsh.