Sinker (noun)

1. A weight or device that is used to make something sink.
2. A fishing lure or weight that is used to make the bait or lure sink to a desired depth in the water.

Origin:

The word sinker is derived from the verb sink meaning to go down or become lower, indicating that it is something that sinks.

Examples:

1. He used a sinker to weigh down his fishing line.
2. The sinker on the fishing line helped the bait sink to the bottom.
3. She used a sinker to keep the curtains from blowing away.
4. The sinker on the end of the diving line helped the divers reach the desired depth.
5. The sinker on the end of the net helped it to sink and catch fish.