FENEDHIS! What does it mean?

Fen - Wolf

Edh = given that dh is pronounced in elvhen like a voiced th, this is likely a variant of Eth, which means safety. Edh probably means something like privacy or private.

Is = shortened of ish, meaning he, or isha, meaning male.

Wolf private male

Wolf male privacy

FENEDHIS MEANS WOLF PENIS.

So when an Elf exclaims, “Fenedhis!” he is essentially saying, “Wolf dick!”

So this means when Solas gets exasperated at Sera, and says, “Fenedhis lasa,” (lasa means to grant or to allow), he is basically saying, “Go fuck a wolf’s dick.” or “Go suck a wolf’s dick.”

You’re welcome.

addendum: This also means that edhis would mean penis, and edhas would mean vagina.