Something Forgotten, Forgotten Thing, Lost Property
Noun
わすれもの
単に忘れ物をしたことを非難してるわけじゃないんだよ。
I'm not blaming you just because you forgot to bring something.
コウイチの飛行機が成田空港に着いた時、コウイチは忘れ物に気づいたのでそのまま同じ飛行機でポートランドへと引き返しました。
When Koichi's plane arrived at Narita Airport, Koichi realized that he forgot something, so he returned Portland on the same airplane.
今日何か忘れ物をしたような気がするんだけど、それが何だったかをどうしても思い出せないんだよな。
I feel like I forgot something today, but I just can’t remember what it is.
Remember how 忘れる is "to forget"? Well, a thing you've forgotten is a forgotten item.
Since you didn't learn this reading for 忘 with the kanji, here's a mnemonic to help you out. If you study this vocabulary out the wazoo わす, it'll never become a forgotten item!