Any fixed point or certain basis.
A cylindrical mechanical fastener that attaches multiple parts together by fitting through a hole and deforming the head(s) at either end.
To command the attention of.
To attach or fasten parts by using rivets.
To make firm or immovable.
To install rivets.
the fineness of the point a pointed object.
acuteness or acuity.
pungency or acidity.
the cutting ability of an edge; keenness.
The product or result of being sharp.
distinctness, focus.