overstudied

/ˌoʊvərˈstʌdid/
verb
  1. Past tense of overstudy: to study something excessively.
    • He overstudied the material and ended up confusing himself.
    • They overstudied the map and still got lost on the hike.
    • She overstudied for the quiz and forgot the basic concepts.
Synonyms
adjective
  1. Having studied too much, to the point of exhaustion or diminished effectiveness.
    • The overstudied student fell asleep during the final exam.
    • She felt overstudied and decided to take a break before the next test.
    • His overstudied mind couldn't focus on the simple questions anymore.