breuddwyd gwrach

== Welsh == === Etymology === breuddwyd (“dream”) +‎ gwrach (“witch, hag”) === Pronunciation === IPA(key): /ˈbrei̯ðʊi̯d ˈɡwraχ/ === Noun === breuddwyd gwrach m (plural breuddwydion gwyrach) pipe dream === Mutation ===