One of the mysteries of the English language finally explained.
The four-year period between the ages of 21 and 25 during which a person may seek to revoke acts done during his or her minority.
Late 17th century; earliest use found in James Dalrymple. From classical Latin quadriennium (in post-classical Latin also quadrennium) quadrennium + ūtile, neuter of ūtilis utile.
quadriennium utile/ˌkwɒdrɪɛnɪəm ˈ(j)uːtʌɪl/
In this article we explore how to impress employers with a spot-on CV.