Funnily enough, e- means "out" (more fundamentally "from") and in- means "in(to)", so that's not an unexpected way to form opposite words.
But in this case, innumerable begins with a different in- meaning "not". (Compare inhabit or immiserate, though.)
Arguably true in general, but in this specific case everything I said was already true in Latin.
Funnily enough, e- means "out" (more fundamentally "from") and in- means "in(to)", so that's not an unexpected way to form opposite words.
But in this case, innumerable begins with a different in- meaning "not". (Compare inhabit or immiserate, though.)