Compound Words Are Clearer (3)

Some English word find these individual words are too hard to learn, they have changed them bravely. For instance, we the name of polygon:

It required us to learn thousands of words, but some reformer just change them and simply as 99-gon, 987-gon and 78-gon etc.

Yet some of those words are still insisting individual names such as the months and week days:

In fact, the reason is very simple, repeat using the same symbols will make everybody feel familiar and clear. Or in other word, when we keep using week-day-one, week-day-two, 91-gon, 66-gon, we are repeating the normal digital system, then we feel clearer, and the repeating itself deepened the impression of these number in our mind too.