Forget whereabouts of and Lose sight of

Lose sight of and forget whereabouts of are semantically related. In some cases you can use "Lose sight of" instead a verb "Forget whereabouts of".

Lose sight of verb - Be no longer able to see.

Forget whereabouts of and lose sight of are semantically related. Sometimes you can use "Forget whereabouts of" instead a verb "Lose sight of".