was it ... again?

k e̞
particle Rare #42,064
was it ... again? Often appears in the expressions 〜っけ or 〜だっけ when recalling or confirming something.
JA: 今日は何曜日だっけ。
EN: What day of the week was it again?
Forms of け
っけ

そんなの心配しなくていいよって、私言わなかった

Didn't I tell you not to worry about that?

バス停にもいなかった

Weren't you at the bus stop too?

— となりのトトロ (1988)

マミ最後まで言わん

Don't you dare finish that sentence!

— すずめの戸締まり (2022)

Sounds similar to