同

同 (Kangxi radical 30, 口+3, 6 strokes, cangjie input 月一口 (BMR), four-corner 7722₀, composition ⿵冂𠮛)

• 侗, 㓊, 哃, 垌, 姛, 峒, 㣚, 恫, 挏, 洞, 狪, 晍, 桐, 烔, 胴, 眮, 硐, 秱, 粡, 絧, 詷 (𫍣) 䞒, 酮, 銅 (铜), 餇, 駧, 鮦 (鲖)
• 迵, 㢥, 戙, 㖯, 峝, 茼, 㸗, 䆚, 㖰, 筒, 痌, 衕, 興, 爂, 璺, 舋, 㸑, 釁, 爨

• 仝, 々

• Kangxi Dictionary: page 175, character 6
• Dai Kanwa Jiten: character 3294
• Dae Jaweon: page 389, character 6
• Hanyu Da Zidian (first edition): volume 1, page 578, character 1
• Unihan data for U+540C

Pictogram (象形): a pipe — original form of 筒 (OC *doːŋ, *doːŋs, “pipe”). A decorative 口 was added later.^{[字源 1]}。

Alternative interpretations include a heavy dish (or, according to other interpretations, a bucket, pole or stretcher) 凡 that requires several people to lift and a mouth 口 commanding orders – cooperation; togetherness.

Perhaps related to Tibetan སྡོང་བ (sdong ba, “to unite; to join”), Mizo intawng (inᴸ-tɔŋᴴ, “to meet together; to tally; to agree”), Mizo intawn (inᴸ-tɔn^F, “to meet together; to tally; to agree”). Unrelated to 叢 (OC *zloːŋ, “to collect; thicket”) (Schuessler, 2007).

同

1. same; identical

   同類／同类  ―  tónglèi  ―  people or things of the same kind

   同一個世界，同一個夢想。 [MSC, trad.]
   同一个世界，同一个梦想。 [MSC, simp.]

   Tóng yīge shìjiè, tóng yīge mèngxiǎng. [Pinyin]

   One World, One Dream. (literally "The Same World, The Same Dream")

   同幾首歌／同几首歌 [Cantonese]  ―  tung⁴ gei² sau² go¹ [Jyutping]  ―  the same old songs

2. to be the same as

   同上  ―  tóngshàng  ―  to be the same as above (aforementioned)

3. together; with each other

   有福同享，有難同當 [MSC, trad.]
   有福同享，有难同当 [MSC, simp.]

   yǒu fú tóng xiǎng, yǒu nàn tóng dāng [Pinyin]

   to share joy together and bear hardship together

4. with (indicating accompaniment or relationship)

   Synonym: 跟 (gēn)

   我同你去  ―  wǒ tóng nǐ qù  ―  I am going with you.

   他同這件事無關。 [MSC, trad.]
   他同这件事无关。 [MSC, simp.]

   Tā tóng zhè jiàn shì wúguān. [Pinyin]

   He has nothing to do with this.

5. (introducing the recipient of an action) with

   Synonym: 跟 (gēn)

   有件事情我想同你商量一下。 [MSC, trad. and simp.]

   Yǒu jiàn shìqíng wǒ xiǎng tóng nǐ shāngliàng yīxià. [Pinyin]

   This is something that I want to discuss with you.

   我先唔同佢哋買呀。 [Cantonese, trad.]
   我先唔同佢哋买呀。 [Cantonese, simp.]

   ngo⁵ sin¹ m⁴ tung⁴ keoi⁵ dei⁶ maai⁵ aa³. [Jyutping]

   I will definitely not buy from them.

   • 我懷著感激與敬重的心情同他道别。 [MSC, trad.]
     我怀著感激与敬重的心情同他道别。 [MSC, simp.]

     From: 卢存岳 (19 December 1987) “赴“二外”讲学乘车小记”, in People's Daily (in Chinese), page 5

     Wǒ huái zhe gǎnjī yǔ jìngzhòng de xīnqíng tóng tā dàobié. [Pinyin]

     (please add an English translation of this usage example)

   • 國家主席習近平12月9日晚同法國總統馬克龍通電話。 [MSC, trad.]
     国家主席习近平12月9日晚同法国总统马克龙通电话。 [MSC, simp.]

     From: 9 December 2020, 习近平同法国总统马克龙通电话 两国元首就下阶段中法合作达成重要共识

     Guójiā zhǔxí Xí Jìnpíng 12 yuè 9 rì wǎn tóng Fǎguó zǒngtǒng Mǎkèlóng tōng diànhuà. [Pinyin]

     On the evening of 9 December, President Xi Jinping had a telephone conversation with French President Macron.

6. used to show comparison

   今年的氣候同往年不一樣。 [MSC, trad.]
   今年的气候同往年不一样。 [MSC, simp.]

   Jīnnián de qìhòu tóng wǎngnián bù yīyàng. [Pinyin]

   The climate this year is different from which of the past.

7. and

   我買咗一包米同一罐汽水。 [Cantonese, trad.]
   我买咗一包米同一罐汽水。 [Cantonese, simp.]

   ngo⁵ maai⁵ zo² jat¹ baau¹ mai⁵ tung⁴ jat¹ gun³ hei³ seoi². [Jyutping]

   I bought a pack of rice and a can of soft drink.

   巴西同阿根廷都係南美洲國家。 [Cantonese, trad.]
   巴西同阿根廷都系南美洲国家。 [Cantonese, simp.]

   baa¹ sai¹ tung⁴ aa³ gan¹ ting⁴ dou¹ hai⁶ naam⁴ mei⁵ zau¹ gwok³ gaa¹. [Jyutping]

   Brazil and Argentina are both South American countries.

8. (dialectal, including Cantonese) for

   同我攞杯水，唔該。 [Cantonese, trad.]
   同我𫽋杯水，唔该。 [Cantonese, simp.]

   tung⁴ ngo⁵ lo² bui¹ seoi², m⁴ goi¹. [Jyutping]

   Please get me a cup of water.

9. (Cantonese) Used in the form of 同我 in imperative sentences for emphasis.

   你同我收聲！ [Cantonese, trad.]
   你同我收声！ [Cantonese, simp.]

   nei⁵ tung⁴ ngo⁵ sau¹ seng¹! [Jyutping]

   Shut the heck up!

10. (Teochew) from (a place or time)
11. a surname

• (and):

• (for):

• (used in imperative sentences for emphasis):

• “同”, in 漢語多功能字庫 (Multi-function Chinese Character Database)‎^[1], 香港中文大學 (the Chinese University of Hong Kong), 2014–
• Dictionary of Chinese Character Variants (教育部異體字字典), A00501

(Second grade kyōiku kanji)

• Go-on: ずう (zū)^{←づう (duu, historical)}
• Kan-on: とう (tō)^{←とう (tou, historical)}
• Kan’yō-on: どう (dō, Jōyō)^{←どう (dou, historical)}
• Kun: おなじ (onaji, 同じ, Jōyō)、ともに (tomo ni, 同に)
• Nanori: あつ (atsu)、あつむ (atsumu)、とも (tomo)、ひとし (hitoshi)

• 同(どう)床(しょう) (dōshō): sharing a bed
• 同(どう)人(じん) (dōjin): doujin

From Middle Chinese 同 (duŋ, “same”).

• (Tokyo) どー [dóꜜò] (Atamadaka – [1])^[1][2]
• IPA^(key): [do̞ː]

同(どう) • (dō-) 

1. same

• 仝, 々

From Middle Chinese 同 (MC duwng).

• (SK Standard/Seoul) IPA^(key): [to̞ŋ]
• Phonetic hangul: [동]

Wikisource

同 (eumhun 한가지 동 (han'gaji dong))

1. hanja form^? of 동 (“same; identical”)

• 국제퇴계학회 대구경북지부 (國際退溪學會 大邱慶北支部) (2007). Digital Hanja Dictionary, 전자사전／電子字典. [2]

同: Hán Việt readings: đồng (德(đức)紅(hồng)切(thiết))^{[1][2][3][4][5][6]}
同: Nôm readings: đồng^[1][2][3], đùng^[1][3][7], đòng^[1], đang^[3], rùng^[1]

1. chữ Hán form of đồng (“co-, homo-”)