also: フィルタ
A device or substance that removes impurities or separates components. Used in both physical and digital contexts.
I replaced the filter in the coffee maker.
This app has a function to apply filters to photos.
I run the water through a filter before drinking it.
This air passes through a filter before entering the room.
It's about time to replace the air conditioner's filter.
I removed the filter to clean it.