1. windowsill
Your windowsill is so dirty, I could confuse it with a pigsty.
There's a crack in the windowsill
Put this plant on the windowsill.
Where are the book and pencil? The book's on the table, and the pencil's on the windowsill.
Anglais mot "un rebord de fenêtre"(windowsill) se produit dans des ensembles:
Furniture and furnishings