pechatto
Compressed flat and thin, like something that's been sat on or stepped on. The shape has been squashed out of it.
💡Used for a hat sat on, a box that got crushed, or bread flattened under heavy objects.
カバンの中でサンドイッチがぺちゃっとつぶれていた。
The sandwich got flat and squished inside my bag.
I sat on my hat and it went ___ completely flat.
帽子の上に座ってしまって___とつぶれた。