minored

/M AY1 N ER0 D/
verb
  1. 1

    To choose or have an area of secondary concentration as a student in a college or university.

    โ€œI had so many credit hours of English, I decided to minor in it.โ€

Source: https://en.wiktionary.org/wiki/minor, https://en.wiktionary.org/wiki/minored