noun, adverb
once or twice; repeatedly
Used adverbially to indicate that something happens a few times, not necessarily many. Often appears in the pattern 一再ならず (more than once).
彼の無断欠勤は一再ならずあった。
His unexcused absences happened more than once.
この問題は一再ならず議論されてきた。
This issue has been discussed repeatedly.