弟

Stroke order

弟 (Kangxi radical 57, 弓+4, 7 strokes, cangjie input 金弓中竹 (CNLH), four-corner 8022₇, composition ⿹弚丿)

• 俤, 㖒, 挮, 涕, 悌, 娣, 綈 (绨), 珶, 梯, 焍, 祶, 睇, 銻 (锑), 稊, 鮷, 豑, 豒, 剃, 鵜 (鹈), 晜, 罤, 鬀, 递

• Kangxi Dictionary: page 357, character 17
• Dai Kanwa Jiten: character 9737
• Dae Jaweon: page 673, character 19
• Hanyu Da Zidian (first edition): volume 1, page 244, character 10
• Unihan data for U+5F1F

Historical forms of the character 弟
Western Zhou	Shuowen Jiezi (compiled in Han)	Liushutong (compiled in Ming)
Bronze inscriptions	Small seal script	Transcribed ancient scripts

Pictogram (象形) of a spear handle wrapped in a leather strap. The wrapping signified order or sequence, which extended to "younger brother".

弟

1. younger brother
2. junior male
3. (literary, humble) I; me (between male friends)
4. Original form of 第 (dì, “sequence”).

• → Thai: ตี๋ (dtǐi, “younger brother”) (said by Chinese race)

• (younger brother):

• “Entry #3144”, in 教育部臺灣台語常用詞辭典 [Dictionary of Frequently-Used Taiwanese Taigi] (overall work in Mandarin and Hokkien), Ministry of Education, R.O.C., 2024.
• “弟”, in 漢語多功能字庫 (Multi-function Chinese Character Database)‎, 香港中文大學 (the Chinese University of Hong Kong), 2014–

(Second grade kyōiku kanji)

• Go-on: だい (dai, Jōyō ^†)
• Kan-on: てい (tei, Jōyō)
• Kan’yō-on: で (de, Jōyō ^†)
• Kun: おと (oto, 弟)、おとうと (otōto, 弟, Jōyō)

 弟 on Japanese Wikipedia

/otopito/ → /otoɸito/ → /otowito/ → /*otowuto/ → /otouto/ → /otoːto/

Originally a compound of 弟 (oto, “younger sibling”) +‎ 人 (hito, “person”).^[1][2]

• (Tokyo) おとーと (Odaka – )^[3][2]
• IPA^(key):

弟(おとうと) • (otōto) 

1. one’s own younger brother
2. a younger male

(alternative reading hiragana おとっ, rōmaji oto')

1. (Kagoshima) younger brother

Used when referring to one’s own younger brother. To refer to someone else’s younger brother, the suffixed form 弟さん (otōto-san) is used instead. When addressing one’s own younger brother, the given name is used, often with a suffix, such as 太郎君 (Tarō-kun). Contrast with addressing one’s own older brother, when one uses the honorific お兄さん (onīsan).

From Middle Chinese 弟 (MC dejX).

• (SK Standard/Seoul) IPA^(key):
• Phonetic hangul:
  • Though still prescribed in Standard Korean, most speakers in both Koreas no longer distinguish vowel length.

Korean Wikisource has texts containing the hanja:

弟

Wikisource

弟 (eumhun 아우 제 (au je))

1. hanja form^? of 제 (“younger brother”)

• 국제퇴계학회 대구경북지부 (國際退溪學會 大邱慶北支部) (2007). Digital Hanja Dictionary, 전자사전／電子字典.

弟: Hán Nôm readings: đệ, dễ

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