watermark

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

водяной знак

1.

водяной знак

to add a watermark to a paper or computer document:

:
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Commercial image resellers often digitally watermark their images.