expression, ichidan verb
Literal meaning: to heat and cool metal to increase its hardness. Used in blacksmithing and metallurgy.
刀鍛冶は鋼に焼きを入れて刃を強くする。
The swordsmith tempers the steel to strengthen the blade.
expression, ichidan verb
discipline harshly; torture; give a hard time
Figurative use: to subject someone to severe training, punishment, or harsh treatment to make them stronger or to extract information. Often used in yakuza or military contexts, but also colloquially for strict coaching.
先輩に焼きを入れられて、新人は泣きそうだった。
The newbie was almost crying after being put through the wringer by his senior.
スパイは敵に焼きを入れられて秘密を白状した。
The spy was tortured by the enemy and confessed the secret.