Meaning/Translation of "stopper death"

[Miles]

No: HPFGUIDX 168257

> bboyminn:
> "Metaphorically" is the key. Snape is speaking, not
> literally, but in symbols. People are always confused
> about 'stopper death', but no one every question the
> likelihood of literally 'bottling fame, or 'brewing
> glory'. He may be able to brew potions that are
> related to or affecting 'fame' or 'glory', but unlikely
> to be taken literally.

(...)

> Some assume 'stopper death' means to contain death in
> a bottle as in a poison. He can contain a substance in
> a bottle that can cause death.
>
> The other interpretation  is that Snape can contain a
> substance in a bottle that will restrain death. To
> contain it in the sense of holding it back or
> restraining it or keeping death at bay. In other words,
> a means of preventing eminent death.
>
> So, 'stopper death' can mean to cause death or to
> prevent death. Personally, I think it means that,
> within certain limits, this magic potion can hold off
> or prevent eminent death. Again, within limits.

Miles:
Simple question: why?
He is talking about "making" fame - not averting it. About  "producing"
glory - not avoid it. Why should he talk about stopping death - instead of
brewing a deathly potion, bottle and cork it?
If we understand "stopper" as a verb (following Geoff's understanding
upthread), there is no reason to read Snape's remark as one about an
antidote. This would be a logical breach in this row. Now, JKR could have
intended a logical breach - but if so, why?

So many people understand this quote as  does, widely interpreting it
concerning HBP and Snape helping Dumbledore to survive the injuries after
the Horcrux destruction.
Just to put a wild speculation into the discussion - we know of a probably
deathly potion in HBP, the green one in the cave. Could it be Snape's work?
And if so, could it be important for DH?

Miles, still not happy with the answer to his question ;)