Often considered a "quintessential funeral dirge" in Ireland (both in the ROI and parts of NI). It is about a woman lamenting that she is dying so far from home, and how she is desperate to be buried in her home of Mhuighinse/Mhuinse/Mweenish.
The song was very likely written by a woman named Máire Ní Chlochartaigh (Maureen Cloherty) on her deathbed. She was in fact from Mhuighinse, and was married to a Taimín Bán Ó Conghaile ("Fair" Tommy O'Connelly), and that while all attempts were made to ferry her back home, the weather was too poor, and she had to be buried in Leitir Calaidh after all.
While it is, of course, a deeply sad and tragic song, it is also incredibly beautiful. You don't have to understand the lyrics, as they are in Gaelige (Irish Gaelic) to hear and feel the deep sorrow.