tablero
/taˈbleɾo/ · B2 · noun · m
board
♟️ tablero = tabla (plank) + -ero (one that holds): a plank-made playing surface
Tablero comes from tabla, meaning plank or board, plus the suffix -ero, which marks a thing tied to something. Chess boards, notice boards, dashboards and shop counters are all flat boards, so the word covers each of them.