means something along the lines of **cry** or **roar**. So think of it as a noise like .
* = to bark, to howl
* = a howl, cry (alternative to )
* = lion’s roar
* = Howler Monkey
* = a bark, a howl
So I guess it’s a term that’s made up for an anime or game. You said it was used in a song? It sometimes happens they coin new words in those (especially in anime and game related music). For the pronunciation you’d have to listen to the song though. If I had to make a guess, it would be ****.
The meaning, however, is straightforward: **heavenly roar**.
edited: provided more examples.