益

• In Korean hanja, the upper component of the character is written 八 instead of 丷, which is also the historical form found in the Kangxi dictionary.
• A CJK compatibility ideograph exists at U+FA17 for the historical form found in the Kangxi dictionary which contains 八 as its upper component.
• A CJK compatibility ideograph exists at U+FAA6 for the alternative hanja used in North Korea which contains 丷 as its upper component.

益 (Kangxi radical 108, 皿+5, 10 strokes, cangjie input 廿金月廿 (TCBT), four-corner 8010₇, composition ⿳䒑八皿(GHTJV or U+FAA6) or ⿱⿳八一八皿(K or U+FA17))

• 𪝞, 𭂚, 𭄷, 嗌, 塧, 㜋, 𡺬, 𭛃, 𭛽, 𪬘, 搤, 溢, 獈, 隘, 膉, 榏, 㱲, 𬎃, 䅬, 𮄷, 縊(缢), 𬙻, 𫆌, 艗, 螠, 謚(谥), 貖, 賹, 𬦜, 𬧬, 𨢘, 㬲, 𡒪, 鎰(镒), 𥂺, 𤐹, 𩝱, 𪤴, 𪕶, 齸, 𥃠
• 𪟢, 𨜶, 𣣼, 𬐭, 䚊, 𭘺, 𩔱, 𭾓, 鷁(鹢), 𧔈, 蠲, 𨽪, 𭗆, 𦶩, 𤸸, 𨶂, 𦿯

• KangXi: page 793, character 18
• Dai Kanwa Jiten: character 22972
• Dae Jaweon: page 1208, character 18
• Hanyu Da Zidian (first edition): volume 4, page 2560, character 6
• Unihan data for U+76CA
• Unihan data for U+FA17
• Unihan data for U+FAA6

Ideogrammic compound (會意) : 水 (“water”) + 皿 (“vessel”). Original form of 溢 (OC *liɡ, “to overflow”). Upper component resembles 氺 (“water”) in a horizontal form.

Bodman (1980) relates it to Tibetan སྐྱེད (skyed, “growth; increase; profit; to generate”), སྐྱེ (skye, “to be born”).

益

1. (obsolete) Original form of 溢 (yì, “to overflow”).

   • 澭水暴益，荊人弗知。 [Classical Chinese, trad.]
     澭水暴益，荆人弗知。 [Classical Chinese, simp.]

     From: Lü Buwei, Master Lü's Spring and Autumn Annals, 239 BCE

     Yōngshuǐ bào yì, Jīng rén fú zhī. [Pinyin]

     The Yong River suddenly overflowed, but the Chu people did not know.

2. (literary) affluent; well-off
3. to increase; to add; to cause gain

   Antonym: 損／损 (sǔn)

   延年益壽／延年益寿  ―  yánniányìshòu  ―  to prolong life

   • 為學日益，為道日損。 [Classical Chinese, trad.]
     为学日益，为道日损。 [Classical Chinese, simp.]

     From: Tao Te Ching, 4^th century BCE, translated based on James Legge's version

     Wéixué rì yì, wéidào rì sǔn. [Pinyin]

     He who devotes himself to learning seeks from day to day to increase; he who devotes himself to the Dao seeks from day to day to diminish.

   • 於是出私金以益公賞。 [Classical Chinese, trad.]
     于是出私金以益公赏。 [Classical Chinese, simp.]

     From: Zhanguo Ce, circa 5^th – 3^rd centuries BCE

     Yúshì chū sījīn yǐ yì gōngshǎng. [Pinyin]

     Thus he expended his private money to add to the official rewards.

4. profit; benefit; gain

   收益  ―  shōuyì  ―  profit

   開卷有益／开卷有益  ―  kāijuǎnyǒuyì  ―  reading is beneficial

5. (literary) more; further; even more

   日益  ―  rìyì  ―  day by day; increasingly

   • 如水益深，如火益熱，亦運而已矣。 [Classical Chinese, trad.]
     如水益深，如火益热，亦运而已矣。 [Classical Chinese, simp.]

     From: Mencius, c. 4^th century BCE

     Rú shuǐ yì shēn, rú huǒ yì rè, yì yùn éryǐ yǐ. [Pinyin]

     If you make the water more deep and the fire more fierce, they will in like manner make another revolution.

6. 42nd hexagram of the I Ching
7. (Cantonese) to benefit; to advantage

   淨係益自己友 [Cantonese, trad.]
   净系益自己友 [Cantonese, simp.]

   zing⁶ hai⁶ jik¹ zi⁶ gei² jau^5-2 [Jyutping]

   to only benefit people in one's own circle

• (more):

Others:

• → Thai: อีก (ìik, “again, (do something) more”)

(grade 5 “Kyōiku” kanji, shinjitai kanji, kyūjitai form 益)

1. benefit
2. gain
3. profit
4. advantage

• Go-on: やく (yaku, Jōyō ^†)
• Kan-on: えき (eki, Jōyō)
• Kun: ます (masu, 益す); ますます (masumasu, 益)
• Nanori: あり (ari); すすむ (susumu); のり (nori); まし (mashi); ます (masu); また (mata); み (mi); みつ (mitsu); やす (yasu); よし (yoshi)

From Middle Chinese 益 (MC ʔiᴇk̚, “increase”). The kan'on reading, so likely a later borrowing.

• (Tokyo) えき [èkí] (Heiban – [0])[2][3]
• (Tokyo) え​き [éꜜkì] (Atamadaka – [1])[2][3]
• IPA^(key): [e̞kʲi]

益(えき) • (eki) 

1. benefit
2. profit

From Middle Chinese 益 (MC ʔiᴇk̚, “increase”). The goon reading, so likely the initial borrowing.

• (Tokyo) や​く [yáꜜkù] (Atamadaka – [1])[2]
• IPA^(key): [ja̠kɯ̟ᵝ]

益(やく) • (yaku) 

1. benefit

• ご-利(り)益(やく) (go-riyaku), 御-利(ごり)益(やく) (go-riyaku)

益 (eumhun 더할 익 (deohal ik))

1. Hanja form^? of 익 (“gain; benefit”).

益: Hán Việt readings: ích (伊(y)昔(tích)切(thiết))[1][2][3][4][5]
益: Nôm readings: ích[1][2][4][6], ịch[3][5]

1. chữ Hán form of ích (“benefit”).
2. Nôm form of ịch (“thud”).