also: きしつ
noun, noun, used as a suffix
disposition; temperament; nature; character
Refers to a person's inherent mental and emotional qualities. The reading かたぎ is common as a suffix (e.g., 職人気質, 学生気質) to describe the typical temperament of a group. The reading きしつ is more formal and often used in standalone noun form.
彼は穏やかな気質の持ち主だ。
He has a gentle disposition.
職人気質の彼は、細部まで手を抜かない。
With his craftsman's temperament, he pays attention to every detail.