Windowsill (noun)

The horizontal surface at the bottom of a window opening, typically used for decoration or as a resting place for plants and other objects.

Origin:

The word "windowsill" originated in the late 19th century from the combination of the words "window" and "sill" that is the horizontal surface that forms the bottom of a window opening.

Examples:

1. She placed a small vase of flowers on the windowsill.
2. The windowsill was the perfect spot for his cat to sit and watch the world go by.
3. He sat on the windowsill and looked out at the beautiful view.
4. The windowsill was decorated with a row of small succulent plants.
5. The windowsill was too narrow to use as a shelf.