Turning a verb phrase into an adjective


I'm trying to translate a song and I came across the following part:

> 消えてしまいそうな僕は

消える means "to disappear" so 消えてしまい could mean "to disappear accidentally" or,
more likely given the context, "to disappear completely". Right?

Therefore 消えてしまいそう has the sense of "likely to disappear completely". My doubt
is: Attaching な to this verb conjugation transforms it into a な-adjective?
Simple like that? Thank you very much.




「[消]{き}えてしまいそうな」 is a phrase consisting of a few words. Even though one may
say that it " ** _functions adjectivally_** ", it is utterly incorrect to call
it an adjective because it is **_not_** one word.

That phrase functions adjectivally because of the 「そう **な** 」 part. Only nouns
can follow 「そうな」 as in:

「おいしそうなピザ」 (lit. the pizza that looks yummy)、「[速]{はや}く[走]{はし}れそうな[車]{くるま}」
(lit. the car that seems capable of running fast), etc.

If you saw a phrase 「～～そう **に** 」, by the way, it would function adverbially
because of the 「に」. Again, one would not call that phrase an adverb just
because it functions adverbially (and modifies a verb or adjective).

「消えてしまい **そうな** [僕]{ぼく}」 would literally mean "me who looks to be
disappearing", "me who is about to disappear (completely)". Depending on the
context, however, it might mean something slightly different.

