clapboard

UK: ˈklæp.bɔːd | US: ˈklæp.bɔːrd

Definition
  1. n. A long, thin, flat piece of wood with edges horizontally overlapping, used for covering the outer walls of buildings.

  2. n. (Historical) A pair of hinged boards used in early filmmaking to mark scenes or synchronize sound.

Structure
clap <to fit or strike>board <flat piece of wood>
Etymology

The word "clapboard" originates from the combination of "clap" (from Old English clæppan, meaning "to fit or strike firmly") and "board" (from Old English bord, meaning "a flat piece of wood"). Historically, clapboards were wooden planks fitted tightly together by overlapping edges, resembling a "struck" or "clapped" assembly. The term later extended to filmmaking, where hinged boards were struck to mark scenes.

Examples
  1. The old house was covered in weathered clapboard.

  2. Carpenters replaced the rotting clapboard with new cedar planks.

  3. In early cinema, the clapboard was essential for syncing audio and video.

  4. The coastal cottage featured white clapboard siding.

  5. He tapped the clapboard shut before filming the scene.