to keep an eye on

Letterlijk: ergens een oog op (gericht) houden

Iets/iemand in de gaten houden. Een oog in het zeil houden.

This American-English idiom means 'to watch someone/something , to make sure nothing bad happens'

Sometimes you will see 'to keep a SHARP eye on' which means to watch someone/something very closely or carefully

Example: "Keep a sharp eye on the dog, to make sure it does not get into fights with other dogs."

- See also the explanation of the idiom 'to keep an eye out for' which means something else.

-See https://lyricstranslate.com/en/p%C3%ADse%C5%88-stra%C5%A1liv%C3%A1-o-gol...

for this and a number of other annotated American-English idioms and informal expressions, used in a context of a translation

не спускать глаз с кого/чего л.; присматривать; смотреть за кем л.; наблюдать за чем-л.