脳

脳 (radical 130, 肉+7, 11 strokes, cangjie input 月火山大 (BFUK), composition ⿰⺼⿱⺍凶)

• KangXi: not present, would follow page 985, character 11
• Dai Kanwa Jiten: character 29567
• Hanyu Da Zidian: not present, would follow volume 3, page 2082, character 1
• Unihan data for U+8133

(grade 6 “Kyōiku” kanji, shinjitai kanji, kyūjitai form 腦)

1. brain

• Go-on: のう (nō, Jōyō)
• Kan-on: どう (dō)
• Kun: なずき (nazuki)^{←なづき (naduki, historical)}

脳 (nazuki, nō): a brain in a jar.

/naduki/ → /nad͡zuki/ → /nazuki/

Originally the noun stem form naduki of verb 漬く (naduku, modern nazuku, “to be immersed in water or other liquid”).[1]

• Kun’yomi
  • IPA^(key): [na̠zɨᵝkʲi]

• 髄

脳 (shinjitai kanji, kyūjitai kanji 腦, hiragana なずき, rōmaji nazuki, historical hiragana なづき)

1. (archaic, anatomy) the brain
   • 794, Shin'yaku Kegonkyō Ongi Shiki (page 68)[2]

     髄脳 上須年 下奈豆技

2. by extension, the head

/nau/ → /nɔː/ → /noː/

From Middle Chinese 腦 (nɑ̌u, “brain”).

• On’yomi: Goon
  • (Tokyo) の​ー [nóꜜò] (Atamadaka – [1])[3]
  • IPA^(key): [no̞ː]

脳 (shinjitai kanji, kyūjitai kanji 腦, hiragana のう, rōmaji nō, historical hiragana なう)

1. (anatomy) brain
   • 1987 May 1 [Mar 20 1987], Fujiko Fujio, “考える足 [The Thinking Foot]”, in みどりの守り神 [Green Guardian God] (藤子不二雄 ＳＦ全短編; 2), volume 2 (fiction), 2nd edition, Tokyo: Chuokoronsha, →ISBN, 第三章, page 724:

     ふ〰む……信じられん‼足首の中に脳細胞が……つまりきみにはもう一つの頭ができたんだ
     そんな‼脳みそ第二号なんて聞いたこともない
     そうでもないさ　恐竜類の中には腰のあたりに神経球をもったものがいる　いわば頭脳の出張所だ　体が大きすぎてひとつの脳ではまにあわなかったんだろうね

     Fu〰mu…… Shinjiraren‼ Ashikubi no naka ni nōsaibō ga…… Tsumari kimi ni wa mō hitotsu no atama ga dekitan da
     Sonna‼ Nōmiso dainigō nan te kiita koto mo nai
     Sō de mo naisa Kyōryūrui no naka ni wa koshi no atari ni shinkeikyū o motta mono ga iru Iwaba zunō no shutchōjo da Karada ga ōkisugite hitotsu no nō de wa maniawanakattan darō ne

     Hmm…… Incredible‼ There are brain cells in your ankle…… That means you grew another head.
     That’s absurd‼ There’s no such thing as a second brain!
     Not really. Some dinosaurs had a nervous sphere on the side of their hips. A subsidiary of the brain if you will. Their bodies must have been too big for just one brain to manage.

2. (figuratively) one's brains, one's mental functioning

   あの野郎 (やろう)は生 (う)まれつき脳 (のう)が弱 (よわ)い。

   Ano yarō wa umaretsuki nō ga yowai.

   That guy was born [with weak brains] → dim-witted.