I've been staring at this part of a section I'm trying to read, and it's the
latter part that has me thoroughly stumped:

[![image](https://i.stack.imgur.com/mLZkP.png)](https://i.stack.imgur.com/mLZkP.png)

While I can suss out the first two characters (pretty sure it's "倒壊"), I can't
figure out what is going on after that. It _looks_ like two more kanji, but
that just gives me something like "寸先" which, as far as I know, doesn't make
much sense given the "な" at the end, and a person's name afterward. That gives
me three characters that don't fit with each other.

I think I need to get a different brain and pair of eyes to take a look, and
give mine a break...

**Edit:** for context's sake, there is a loud, ringing noise (with "されて"
tacked on to the onomatopoeia) going on that is affecting the person, and in
that sentence "理性" comes right before "倒壊", so...perhaps the noise is so loud
that it's making the person feel like they're losing their mind?

After that, the point of view moves to someone else's perspective, so it's
just this sentence describing a loud, ringing noise, and how it must be
affecting this person.

Hopefully that helps.
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question
words kanji
Having Trouble Identifying This Character (or Characters?)
As @naruto pointed out, this is certainly a misspelling. However given the
efforts and context OP has provided, I think an answer before closing won't
hurt.

Now, the context is 理性[text in question] [person's name].

Looking at the picture, "倒壊寸先な" is the only possible transcription. This is
almost certainly a misspelling of "倒壊寸前な". (which, as I explain later, would
probably fit better if it were "崩壊寸前な"). 寸前の is actually more common, see [the
question](https://japanese.stackexchange.com/questions/48585/is-there-a-
difference-between-%e6%9c%80%e9%ab%98%e3%81%ae-
and-%e6%9c%80%e9%ab%98%e3%81%aa) @naruto linked to.

I can't provide any source but this kind of misspelling (in handwriting) is
not uncommon. '先' and '前' shares somewhat similar meaning and the on-reading
is similar (sen vs zen), which makes them mixed up in the brain.

As for the meaning, I think you are guessing right. The noise is so loud, that
the person is almost losing their mind. 倒壊 _to collapse_ is more often used
for buildings and others, while 崩壊 is probably much more commonly seen with
理性.
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answer