焼く

From Old Japanese. Appears in the Kojiki of 712 CE, and in the Man'yōshū completed some time after 759 CE.[1][2][3] From Proto-Japonic *yaku.

• (Tokyo) やく [yàkú] (Heiban – [0])[4][5][6][7]
• (Tokyo) やく​ [yàkúꜜ] (Odaka – [2])[6]
• IPA^(key): [ja̠kɯ̟ᵝ]

焼(や)く • (yaku) transitive godan (stem 焼(や)き (yaki), past 焼(や)いた (yaita))

1. to change something by means of fire, light, chemicals, or other means:
   1. to burn
      1. [from 712] to set on fire, to light on fire
      2. [from 720] to burn to ashes
   2. to burn (to write data to a permanent storage medium)
   3. [from 720] to use heat or flame to prepare something for eating or using:
      1. (cooking) to grill
      2. (cooking) to broil
      3. (cooking) to fry
      4. (cooking) to toast
      5. (cooking) to roast
      6. (cooking) to bake
      7. (pottery) to fire
   4. [from 850] to apply moxibustion
   5. [from 1966] to expose to sunlight and cause to change color: to tan one's skin
   6. [from 1908] (photography) to print a photograph by shining a light through a negative
   7. [from 1884] to rub chemicals
   8. [from 1960] to have a sensation, to burn (the heart)
2. (figuratively) to convey feelings from the heart:
   1. [from 759] to worry
   2. to care
   3. [from 1687] 妬く: to envy, to be jealous
   4. [from 1662] to make someone happy

焼(や)く • (yaku) intransitive ^†nidan

1. (obsolete) to change on its own by means of fire, light, chemicals, or other means: to burn, to tan, to be cooked

The intransitive use of yaku is now obsolete, and has been superseded by the modern form 焼ける (yakeru).