repetend

詳細解釋：

rep.e.tend

n.（名詞）
A word, sound, or phrase that is repeated; a refrain.
疊句：重複的詞語、聲音或短語；重複句
Mathematics The digit or group of digits that repeats infinitely in a repeating decimal.
【數學】 循環節：在循環小數中無限重複的數節或一組數節

來源：
From Latin repetendum [neuter gerundive of] repetere [to repeat] * see repeat
源自 拉丁語 repetendum [] repetere的中性動形詞 [重複] *參見 repeat