pebble
pebble n
Origin obscure.
- Stone; small rock.
- Insignificant ammunition; ineffective bullet; [fig.] insufficient power; futile might; feeble force.
- [Fig.] obstacle; stumbling block; obstruction to further progress.
- Projectile; object thrown into a body of water, causing ripples; [fig.] influence; effect; impact.
- [Fig.] silent witness; inconspicuous bystander.