marbles

The English word “marbles” has 3 meanings listed here.

noun

Any of several children's games played with small balls (made of marble or more commonly glass).
Sanity.
Bits of rolled-up rubber shed by the tires of race cars that accumulate at the edges of the track, especially at the corners.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.