degree of seriousness; level of commitment
Used to measure how serious or committed someone is, often in contexts like dating, job hunting, or business proposals.
彼の本気度が伝わってきた。
I could tell how serious he was.
採用面接では本気度が重視される。
In job interviews, your level of commitment is highly valued.
Compound of 本気 (seriousness) + 度 (degree). The exact historical derivation is uncertain, but the word follows a common pattern for expressing degree.