The term window sill is a phrase, a noun. It is the wood at the bottom of the window along the inside, toward the room.
She sat on the window sill, watching the world outside.
sill
window sill in Tagalog: pasimano
The cat is sleeping on the window sill.
sash, pane, sill
The bird landed on the window sill
butterflies sleep on a window sill or on their back
you have to jump window sill to window sill and climb up
sill
Wood or stone that runs along the bottom of a door or window
sill
It depends on how heigh the window sill is from the ground. it can be right above it, or far from the floor.