noun
Refers to mental or emotional burden, often used in the phrase 気骨が折れる (to be a source of worry or to be mentally taxing).
子供の将来を考えると気骨が折れる。
Thinking about my child's future is a source of worry.
彼は気骨の多い仕事を任されている。
He is entrusted with a job that involves a lot of mental strain.