noun
fidelity; faithfulness; accuracy
Technical term used in fields such as audio, data transmission, and reproduction to describe how accurately a copy or signal matches the original. Not commonly used in everyday conversation.
このスピーカーは音の忠実度が高い。
This speaker has high sound fidelity.
データの忠実度を保つために、定期的に
To maintain data fidelity, regular backups are necessary.
Compound of 忠実 (faithful) + 度 (degree). The exact historical derivation is uncertain, but the word follows a standard pattern for forming technical terms indicating a measurable quality.