I read this phrase in a book:
I'm guessing the
唸った, or groan, but I'm curious as to if
口の中 has a meaning or implication other than the obvious, inside his mouth. How does one groan if not inside one's mouth? My best guess is that it's something along the lines of "under his breath"...but that still doesn't seem right to me.
For context, the
彼 is (something like) a high priest who's speaking with the emperor (which is what makes me think he is trying to suppress a groan out of respect).