hot blood; warm blood
Literal meaning referring to blood that is physically warm or hot. Often used in medical or biological contexts.
熱血が全身を巡る感覚があった。
I felt hot blood circulating through my body.
He's a passionate teacher who's popular with his students.
Figurative use describing passionate, enthusiastic, or hot-blooded temperament. Often used in compounds like 熱血漢 (passionate person) or 熱血教師 (passionate teacher).
彼は熱血あふれる指導で知られている。
He is known for his passionate guidance.
あの熱血教師は生徒たちに大人気だ。
That passionate teacher is very popular with the students.
The coach showed his fiery passion during the match.
熱意 describes focused, task-oriented eagerness or earnestness, whereas 熱血 suggests a broader, emotional and spirited disposition.
血気 refers to youthful vigor or rash impulsiveness driven by hot blood, while 熱血 more often carries a positive sense of admirable passion or zeal.
冷血 describes a cold, unfeeling temperament, the direct opposite of the fiery passion implied by 熱血.
hot-blooded man; passionate man
enthusiastic teacher; passionate teacher
hot-blooded man; passionate man
Compound of 熱 (heat) and 血 (blood). The literal meaning 'hot blood' naturally extended to the figurative sense of 'passionate temperament'.