I recently found out:
The Japanese have a traditional apology – sumimasen. And most verbs in Japanese end with mas (u is not read), indicating the verb of the present time. The verbal of the present time with denial ends in masen. For example, ikimasu - to go, and ikimasen - not to go. Recently I learned that the verb "sumimasu" means "to live". Accordingly, "sumimasen" - not to live. Thus, polite Japanese instead of normal "sorry" say something like "what's bad".