Nor do I have the faintest idea what all that means ~ sorry. I'd class it in the 'deliberately obscure' group of lyrics. The whole thing gives a very dark and gloomy impression.Thy is an archaic form of your (singular).
The line you quoted is part of a song:
May I redeem my funereal self
in thy mirror of soul sanctorum
to frame every night a delight
SourceI've no idea what that means.
Song lyrics are not necessarily meant to be readily understood - and are sometimes deliberately obscure.
It is still used, but almost exclusively in a figurative sense: It's most often used in AE to compare something to a funeral. If people are feeling sad or glum, or if a place has a depressing atmosphere, you might use "funereal" to describe the prevailing mood.Thank you all, but I want to ask also if the adjective "funereal" is often used in English to refer to things related to death. Is it still used nowadays?