watermark

US /ˈwɑː.t̬ɚ.mɑːrk/
UK /ˈwɑː.t̬ɚ.mɑːrk/
1.

العلامة المائية

1.

العلامة المائية

to add a watermark to a paper or computer document:

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Commercial image resellers often digitally watermark their images.