The opposite of apposite is—
well, I’m not that certain,
but it could be…
a composite of the two?
Like a photo fit
or a camp site—
no, that’s not right…
at all.
The opposite must be…
detectable in a Thesaurus.
Let me look.
Ah! Inappropriate!
I thought it might have been
one of those sorts of words.
Which was found by the use of synonyms
and antonyms – mainly the latter –
which is where you would expect to find
words of that kind.
Perhaps a bit of preparation
Would have helped sort out the above
in a couple of lines.
No wonder I always received overdue library book fines.
Graeme Sandford 
A Side-by-side comparison with a standard is where “appose” transformed to “apposite”. But now both are ruined. Even twins can be different if one was scratched by a cat and the other wasn’t. And then the etymological parents have to decide which twin is their favorite. Kids don’t like that, neither do goats.