万歳

Shift in reading from 万(ばん)歳(ぜい) (banzei) below, keeping the older goon reading for the second character and adopting the relatively newer kan'on reading for the first character.

• (Tokyo) ばんざ​い [bàńzáꜜì] (Nakadaka – [3])[1][2]
• IPA^(key): [bã̠nd͡za̠i]

万(ばん)歳(ざい) • (banzai) 

1. an extremely long period of time
   • 1936, “第五章　母音と父音 [Chapter 5: Vowels and Consonants]”, in 誰にも分かる獨習英語の學び方 [Self-Taught English for Everyone], 英語研究会, page 30:

     大(だい)日(にっ)本(ぽん)帝(てい)國(こく)萬(ばん)歲(ざい)！

     Dai Nippon Teikoku banzai!

     Long live the Japanese Empire!

2. (raising one's hands three times in cheer) raising ones hands
3. (raising one's hands in defeat) business troubles, bankruptcy

万(ばん)歳(ざい) • (banzai) 

1. an expression of celebration

• (specialized) マンセー (mansē), ウラー (urā)

• → English: banzai
• → Indonesian: banzai

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium. Particularly: “see Wiktionary:Requests for cleanup#万歳”)

From Middle Chinese 萬歲 (MC mjonH sjwejH). The kan'on, so likely a later borrowing.

• IPA^(key): [bã̠nd͡ze̞ː]

万(ばん)歳(ぜい) • (banzei) 

1. an extremely long period of time
2. long life and glory
3. death

万(ばん)歳(ぜい) • (banzei) 

1. an expression of celebration

From Middle Chinese 萬歲 (MC mjonH sjwejH). The goon, so likely the initial borrowing.

• (Tokyo) まんざ​い [màńzáꜜì] (Nakadaka – [3])[1][2]
• IPA^(key): [mã̠nd͡za̠i]

万(まん)歳(ざい) • (manzai) 

1. an extremely long period of time
2. (historical) alternative form of 萬歳 (“Edo manzai (a traditional New Year performance)”)
3. a song and dance to celebrate a new year
4. a song sung to celebrate a new year

万(まん)歳(ざい) • (manzai) 

1. an expression of celebration