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The following video provides you with the correct English pronunciation of the word "Annwn", to help you become a better English speaker.

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Noun
1. (Welsh mythology) the other world; land of fairies
(synonym) Annwfn
(hypernym) imaginary place, mythical place
(classification) mythology
(classification) Wales, Cymru, Cambria

[Celtic] An underground Netherworld region found in Welsh legend. Surviving from pre-Christian Celtic mythology, it's immortal inhabitants are the fair folk, demons or thinly disguised deities depending on the viewpoint. Neither Heaven nor Hell in the Christian sense, humans can enter spiritually or corporeally. Annwn, or Annwfn, is ruled by Gwyn ap Nudd or Gwyn, son of Nodons, a briton god whose temple was at Lydney in the forest of Dean. He often appears among mortals to meddle in their affairs. Found at Arthur's court in Culhwch and Owen, where God is said to have given him dominion over the demons, "lest this world be destroyed." Folklore transforms him into the leader of the Wild Hunt, riding through the clouds raising human shades, along with the red-eared hounds of Annwn and occasionally by the undead Arthur himself. There are various entry points into Annwn, namely Lundy Island and Glastonbury Tor. There is a legend of an itenerant Welsh saint named Collen entering Gwyn's palace wit...
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Annwn (Welsh) In Druidism, the great deep below the human world, the lowest plane of Abred. The soul had its origin in Annwn and evolved up thence through every possible form of life till it reached the human world. By long continued persistent evildoing, it might then sink into Annwn again, through Cydfil and Obryn, such sinking into Annwn being final and leading to annihilation: Nid a i Annwn ond unwaith (there is but one descent into Annwn) -- avichi.