Best is an adjective in that case (and in most). It would be an adverb if you didn't hyphenate "best-laid plans", not that I'm sure that wouldn't be incorrect.
If "deathly" is not the adjectival form, I'm not sure what is. "Deathy" is not a word, nor "deathous". It can be an adverb: "deathly pale" (pale being an adjective describing something), but I see no issue with using it as an adjective, as well.
In conclusion, blog-writer-whose-page-will-not-load, if you use an incorrect example to make a point (in this case about her over-use of adverbs), it will make me think you do not know what you're talking about.
Laga, Hallows of death, to me, means something else. Those would be, in my head, ghosts that are going to kill you (synonymous with deadly hallows). Deathly hallows are...well, really dead ghosts...or something like that.
Doesn't any one else think that 'Hallows' could be a place-name or place-name element? That's the other meaning I'm familiar with for it.
That's not "hollow" or "hollows"?
That's a place-name element too, it's true, but I'm sure 'hallows' is as well.
I'm thinking it's a reference to Halloween in some form, especially as Harry's parents were killed on Halloween. Deathly Hallows sounds to me like things are coming full circle.
Doesn't any one else think that 'Hallows' could be a place-name or place-name element?
ISTR it from
The Return of the King.
Wasn't the area in Minas Tirith with the tombs of the kings called the Hallows?
Sounds plausible, dcp. It could be that's what I'm remembering.
I still remain unconvinced, especially with the existence of Godric's Hollow as an established place (the location of the former Potter residence). A hollow and a hallow as two different locations seems excessively confusing.