noun / adjective
cobblestone
KAH-buhl-stohn/kˈɑbʌlstˌoʊn/
A rounded stone used to pave streets, or paving made with such stones.
One loose cobblestone lies beside the short patch of rounded paving stones.

Etymology
Cobble identifies the rounded, water-worn kind of stone suitable for paving. The compound also once meant a cherry pit, reflecting its use for small, roundish stones.
In context
uneven pavement, cobblestone roads, stones that are far apart where your foot could twist like in between the stones or a slick airport floor.
More examples
- The narrow cobblestone street leads to the town square.
- Workers replace the cracked cobblestones near the curb.
- The courtyard is paved with cobblestone.
Forms
cobblestone · cobblestones
Similar words
- cobble
- A rounded stone, not necessarily one used for paving.
- paver
- A paving block, often manufactured rather than naturally rounded.
- flagstone
- A broad, flat paving stone rather than a rounded one.