noun
sweat and blood; hard work; toil
Literary or formal term for great effort and sacrifice, often used in expressions like 汗血の努力 (painstaking effort).
汗血の努力で事業を成功させた。
He made the business a success through sweat and blood.
この成果は汗血の結晶だ。
This achievement is the fruit of blood, sweat, and tears.