Fushi in Japanese most commonly means "immortality" or "eternal life".
In Japanese the word "fushi" when meaning "immortality" or "eternal life" is often used for characters or concepts which cannot die such as in T Your Eternity (Fumetsu no Anata e- To You, the immortal).
Fushi also has several different meaning in Japanese.
Other meanings of "fushi" are "joint" or "knuckle," a "tune" or "melody," or a "knot" in wood or bamboo and even "aspect" or part," as in "I have a feeling" -omoi ataru fushi ga aru).
Fushi in Japanese can also be seen in architectural contexts, it can mean "style" or even "grace" like in Fushikaden,which is a text on Noh theater.
While Fushi in Japanese is often and mainly linked to "To Your Eternity as "immortality," "fushi" can also refer to physical joints, musical notes or even abstract qualities depending on the context of the kanji used.