noun
compatibility; conformance; fitness; adaptability
Refers to the degree to which something meets requirements, standards, or is suitable for a particular purpose. Often used in technical, engineering, or regulatory contexts.
この材料の適合性を試験する必要がある。
We need to test the suitability of this material.
規格への適合性が確認された。
Conformance to the standard was confirmed.
適応性 emphasizes the ability to adapt to changing conditions, whereas 適合性 is about meeting a fixed standard or being fit for a specific purpose.
Compound of 適合 (tekigō, 'conformity, suitability') + 性 (-sei, '-ness, -ity'), a common pattern for forming abstract nouns expressing a quality or property.