noun
fourth-year university student; senior
Used primarily in the context of a four-year university program to refer to a student in their final year.
彼は四回生で、来年卒業する予定だ。
He is a fourth-year student and plans to graduate next year.
四回生になると、就職活動が本格化する。
When you become a fourth-year student, job hunting gets into full swing.
Compound of 四 (four) + 回 (counter for occurrences, here referring to academic years) + 生 (student). The reading よんかいせい follows standard on'yomi patterns.