嘆

• In Traditional Chinese, Japanese kyūjitai, Korean hanja and Vietnamese Hán Nôm, the component   for this character is written with 廿 on top. Note that the bottom portion is written 口 overlapped by 夫 and not 中 on top of 天.
• In Japanese shinjitai, the component   is written either with ⺾ (3 strokes) on top and has one stroke less. Due to Han unification, both traditional Chinese and Japanese shinjitai forms are encoded under the same code point. The appearance of this character will differ depending on the font used.
• In Simplified Chinese, the component   is simplified to 又 instead, giving the character 叹 (U+53F9).
• Two compatibility ideographs exist for this character. U+FA37 corresponds to the kyūjitai form of this character while U+2F84C is an alternative form used in Taiwan and North Korea which is similar to Japanese shinjitai but the top right component is written ⺿ (4 strokes) instead of ⺾ (3 strokes).

嘆 (Kangxi radical 30, 口+11 in Chinese, 口+10 in Japanese, 14 strokes in Chinese, 13 strokes in Japanese, cangjie input 口廿中人 (RTLO) or 口廿日人 (RTAO), four-corner 6403₄, composition ⿰口⿱廿⿻口夫(GHTKV or U+FA37) or ⿰口𦰩(J or U+2F84C))

• 𫛗

• 叹 (Simplified Chinese)
• 歎 (Orthodox form in Hong Kong; Variant traditional form of 嘆 in Mainland China)

• Kangxi Dictionary: page 205, character 1
• Dai Kanwa Jiten: character 4138
• Dae Jaweon: page 427, character 21
• Hanyu Da Zidian (first edition): volume 1, page 673, character 8
• Unihan data for U+5606

• Unihan data for U+FA37

• Unihan data for U+2F84C

嘆

1. to sigh

   一聲長嘆／一声长叹  ―  yīshēng chángtàn  ―  to heave a deep sigh

   他深深的嘆了一口氣。 [MSC, trad.]
   他深深的叹了一口气。 [MSC, simp.]

   Tā shēnshēn de tàn le yī kǒu qì. [Pinyin]

   He let out a deep sigh.

2. (literary or in compounds) to chant
3. (literary or in compounds) to praise; to exclaim in admiration

   嘆服／叹服  ―  tànfú  ―  to gasp in admiration

   嘆為觀止／叹为观止  ―  tànwèiguānzhǐ  ―  to gasp in amazement

4. (grammar) Short for 嘆詞／叹词 (tàncí, “interjection”).
5. (Cantonese) to enjoy

   嘆世界／叹世界 [Cantonese]  ―  taan³ sai³ gaai³ [Jyutping]  ―  to enjoy life

   嘆冷氣／叹冷气 [Cantonese]  ―  taan³ laang⁵ hei³ [Jyutping]  ―  to enjoy air conditioning

嘆 is considered a variant form of 歎 in Hong Kong.

• (to sigh):

• (to chant):

• (to praise):

(Jōyō kanji, shinjitai kanji, kyūjitai form 嘆)

1. to sigh
2. to lament
3. to moan
4. to grieve

• Go-on: たん (tan, Jōyō)
• Kan-on: たん (tan, Jōyō)
• Kun: なげく (nageku, 嘆く, Jōyō)、なげかわしい (nagekawashii, 嘆かわしい, Jōyō)^{←なげかはし (nagekafasi, 嘆かはし, historical)}、なげかう (nagekau, 嘆かう)^{←なげかふ (nagekafu, 嘆かふ, historical)}

From Middle Chinese 嘆 (MC than|thanH).

• (Tokyo) たん [táꜜǹ] (Atamadaka – [1])^[2]
• IPA^(key): [tã̠ɴ]

嘆(たん) • (tan) 

1. sigh

Wikisource

嘆 (eumhun 탄식할 탄 (tansikhal tan))

1. Alternative form of 歎 (“hanja form^? of 탄 (“sigh”)”)

• Supreme Court of the Republic of Korea (대한민국 대법원, Daehanmin'guk Daebeobwon) (2018). Table of hanja for personal names (인명용 한자표 / 人名用漢字表, Inmyeong-yong hanja-pyo), page 45. [2]

嘆: Hán Việt readings: thán (他(tha)案(án)切(thiết))^[1][2][3][4], than^[4]
嘆: Nôm readings: than^{[1][2][3][5][4][6]}, han^{[1][2][3][4][7][6]}, thán^[2][5][6], thăn^[5][6], hớn^[1], hen^[3], thơn^[3]

1. Nôm form of than (“to complain”).