merllyn

• merlyn, marwllyn

From merf (“insipid”) +‎ llyn (“lake, pool”).

merllyn m (plural merllynnoedd or merllynnau)

1. stagnant pool

   Synonyms: merddwr, sefydlyn

2. oxbow lake

   Synonym: ystumllyn

• beistonell merllyn (“shoreweed”)
• diosglys merllyn (“lake quillwort”)
• gwair merllyn (“quillwort”)

• D. G. Lewis, N. Lewis, editors (2005–present), “merllyn”, in Gweiadur: the Welsh–English Dictionary, Gwerin
• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “merllyn”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies