Watermark (noun)

1. A transparent design or symbol that is superimposed onto paper or another material and can only be seen when held up to the light or viewed at an angle.
2. A digital image or symbol that is added to a digital file to indicate ownership or authenticity.

Origin:

Derived from the noun 'water' and the verb 'to mark'.

Examples:

1. The watermark on the paper was the company's logo, serving as a subtle reminder of its brand and reputation.
2. The watermark was added to the digital file to prevent unauthorized use and ensure that the file's owner was properly credited.
3. The watermark on the paper was barely visible, but it was enough to deter counterfeiters from attempting to forge the document.
4. Many photographers use watermarks on their digital images to protect their copyright and prevent unauthorized use.
5. The watermark on the paper was a sign of its high quality, serving as a symbol of the paper mill's attention to detail and commitment to excellence.