This is the 6121st most frequent Japanese word.
オモリ
Weight; sinker.
In this context, 'オモリ' is used to refer to a weight or sinker used in fishing to help the lure sink.
釣りのために新しいオモリを買いました。
I bought a new weight for fishing.
Here, 'オモリ' is used to describe a weight mechanism on a door that aids in its automatic closing.
ドアが自動で閉まるようにオモリが付いています。
The door has a weight attached to automatically close it.
In this sentence, 'オモリ' denotes weights used to secure the tent against wind.