noun, noun, used as a suffix
General term for the degree of excellence or worth of something, often used in evaluations, comparisons, and as a suffix in compounds like 高品質 (high quality).
この製品は質が良い。
This product is of good quality.
質より量を重視する人もいる。
Some people prioritize quantity over quality.
noun
nature; inherent quality; character
Refers to the intrinsic attributes or essential character of a person or thing, often in more abstract or philosophical contexts.
彼の行動は彼の質を表している。
His actions reflect his character.
この問題の質を理解する必要がある。
We need to understand the nature of this problem.
noun
logical quality
Technical term in logic, referring to the affirmative or negative character of a proposition. Rare outside specialized contexts.
論理学では、命題の質は肯定か否定かで決まる。
In logic, the quality of a proposition is determined by whether it is affirmative or negative.
The kanji 質 originally relates to substance or material. The reading しつ is the on'yomi, commonly used in Sino-Japanese compounds. The historical derivation is straightforward; no uncertain elements.