Hush-hush and Middle-ground

Hush-hush adjective - Not known or meant to be known by the general populace.

Middle-ground and hush-hush are semantically related In some cases you can use "Middle-ground" instead an adjective phrase "Hush-hush".

Hush-hush and middle-ground are semantically related in unwilling to decide topic. Sometimes you can use "Hush-hush" instead an adjective phrase "Middle-ground".