checker
UK: ˈtʃɛkə | US: ˈtʃɛkər
n. 1. A person or thing that checks or verifies.
n. 2. A pattern of squares, typically alternating in color (e.g., a checkerboard).
n. 3. A piece used in the game of checkers/draughts.
The word "checker" derives from the verb "check," which originally meant "to stop or control" (from Old French eschequier, related to chess). Over time, "check" expanded to mean "verify" or "mark with a pattern of squares." The suffix "-er" was added to form a noun indicating a person/thing performing the action (e.g., a verifier) or an object with the described feature (e.g., a patterned grid). The game "checkers" takes its name from the checkerboard pattern on which it is played.
The teacher acted as a checker to ensure all answers were correct.
The tablecloth had a red and white checker design.
He moved his black checker diagonally across the board.
Quality control checkers inspect products for defects.
The floor tiles were arranged in a classic checker pattern.