甲斐

Orthographic borrowing from Japanese 甲斐(かい) (Kai).

甲斐

1. (～市) Kai (a city in Yamanashi Prefecture, Japan)
2. an orthographic borrowing of the Japanese surname 甲斐, Kai

From Old Japanese. First attested in the Man'yōshū of 759.^[1]

Derived from the 連(れん)用(よう)形(けい) (ren'yōkei, “stem or continuative form”) of the verb 代(か)う (kau, “to exchange or replace one thing with another”),^[1][2] with the basic sense being "that which should be the result / outcome / replacement".^[1]

• (Tokyo) かい [kàí] (Heiban – [0])^[2][3]
• IPA^(key): [ka̠i]

甲斐(かい) • (kai) ^{←かひ (kafi)?}

1. value, reward, avail, being fruitful or worth doing

• 甲斐 (-gai, suffix)
• 不甲斐ない (fugainai)

甲斐(かい) • (Kai) ^{←かひ (Kafi)?}

1. Kai (a city in Yamanashi Prefecture, Japan)
2. Kai (a historical province of Japan, roughly corresponding to present-day Yamanashi Prefecture)

   Synonyms: 甲斐国 (“かいのくに, Kai no kuni”), 甲州 (“こうしゅう, Kōshu”)

3. a surname
4. a male given name

• 甲州(こうしゅう) (Kōshū)

Shift from 甲斐 (kai). The kai changes to gai as an instance of rendaku (連濁).^[3][4][5][6]

First attested in a text from 1797.^[4]

• IPA^(key): [ɡa̠i]

• The pitch accent depends on the entire suffixed term.

甲斐(がい) • (-gai) ^{←がひ (-gafi)?}

1. value, reward, avail, being fruitful or worth doing

   生(い)きがいのある人生(じんせい)を送(おく)る

   ikigai no aru jinsei o okuru

   to live a life worth living