These edges are very sharp.

I'm standing on the edge of the cliff and looking down.

The sound of the death knell was terrifying.

Square brackets are used in this text.

The border between two countries is important for trade and migration.

I bought a glass prism in the store.

Thorough checks are carried out at the border checkpoint.

We have a square table in the living room.

The stoat is a small predatory animal with a white winter coat.

My house borders on the woods.