外
oe
外 is not 'outside', it is 'past the line you drew'
The picture A line drawn, and something set beyond it or stepping across it. 外 is beyond the line; 內 is within it.
Where the picture shows up in 外
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stepping past the line of home
아침에 잠깐 외출(外出)했어요.
a-chi-me jam-kkan oe-chul-hae-sseo-yo
I went out for a bit this morning.
A foot crossing the threshold and landing outside the outline called home
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the far side of the country line
저는 해외(海外)에서 왔어요.
jeo-neun hae-oe-e-seo wa-sseo-yo
I'm from another country.
A place beyond our outline, across the thick line called the sea
-
set apart outside the box
이번만 예외(例外)예요.
i-beon-man ye-oe-ye-yo
We're making an exception just this once.
A row of things all filed into the same box, with exactly one set outside it
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moved outside the list
저는 제외(除外)해 주세요.
jeo-neun je-oe-hae ju-se-yo
Please leave me out.
A name erased from inside the list and rewritten outside its border
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past the line of the roof
어제는 야외(野外)에서 먹었어요.
eo-je-neun ya-oe-e-seo meo-geo-sseo-yo
We ate outside yesterday.
A table set beyond the outline of walls and roof, with open sky above it
All of it in one picture
外 is past the line. Step over the line called home and you have gone out; the far side of the line called the sea is overseas. When everything files into the same box and one thing sits outside it, that is an exception; move a name from inside the list to outside and that is exclusion. And eat past the line of walls and roof, and you are outdoors.