noun / verb
pebble
PEB-ul/ˈpebl/
A small rounded stone, often worn smooth by water.
A smooth rounded pebble rests beside a few grains of sand.

Etymology
Old English papolstan already named a pebblestone, so the stone meaning is inherited. Its deeper origin is unknown; the source offers only tentative comparisons.
In context
you get like a really small pebble in your shoe and it's it's annoying, but it's not annoying enough that you're going to stop and take your shoe off.
More examples
- He skips a flat pebble across the pond.
- Tiny pebbles crunch beneath our shoes.
- They pebble the garden path for better drainage.
Forms
pebble · pebbles · pebbled · pebbling
pebbly adjective — Covered with or full of pebbles.