Casement (noun)

A window that is attached to its frame by one or more hinges, and opens outward by turning a handle or by using a crank mechanism.

Origin:

The word casement is derived from the latin word "casus" meaning a falling and "mentum" meaning a projecting structure, which refers to the construction of the window.

Examples:

1. The house had several casement windows which let in a lot of light.
2. The old castle had casement windows that were narrow and arched.
3. Casement windows are known for their excellent energy efficiency.
4. The casement window in the living room was wide open, letting in the fresh air.
5. The new casement windows were designed to be easy to open and close.