Etymology of Sasuga

流石　(Sasuga)
The word represents the feeling you have when a person whom you expect to perform well does, in fact, perform well, and you feel a sense of awe all over again at their amazing feat.

To learners of the language, sasuga is a little frustrating in that it's one of those ridiculous ateji words whose reading and kanji characters don't match. But there's a cute little story about why sasuga is written this way today:

Etymology of Arigato

The word "arigato" (有難う), or "thank you" in Japanese, finds its roots in the word arigatashi (有り難し), an archaic adjective describing rarity.

Words to Express Condolences in Japanese

A quick translation from an all-around useful site on Japanese funerals.

When you want to express condolences to a Japanese friend or acquaintance over his or her loss of a loved one, the appropriate phrases are: