South Korean Flag love the meaning behind it. I've also heard that the short and long lines along with representing the elements also represent the strong protecting the weak and the weak protecting the strong. Like the taegeuk, its all about BALANCE.
"NIm" and "ssi" are usually suffixes, i. "seonsaeng-nim", "ssi" with proper names, such as "Seung Jo-ssi". Most of the other words in this list don't need the "nim" or "ssi" (except where they are part of the word, viz.