cartridge

UK: ˈkɑːtrɪdʒ | US: ˈkɑːrtrɪdʒ

Definition
  1. n. a container holding a spool of photographic film, a quantity of ink, or other item, designed for insertion into a mechanism

  2. n. a casing containing a bullet, propellant, and primer for firearms

  3. n. a removable component of a device (e.g., a printer cartridge)

Structure
cart <paper>ridge <case>
Etymology

The word cartridge originated in the late 16th century, initially referring to a paper case for gunpowder and bullets. The term combines cart (paper) and ridge (case), reflecting its original design as a paper-wrapped package. Over time, it expanded to include ink, film, and other removable containers, retaining the core idea of a protective casing.

Examples
  1. The printer ran out of ink, so I replaced the cartridge.

  2. Soldiers loaded their rifles with fresh cartridges before the battle.

  3. This camera uses 35mm film cartridges.

  4. The game console requires a memory cartridge to save progress.

  5. He carefully removed the spent cartridge from the revolver.