Hush-hush and On-the-fence

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

On-the-fence and hush-hush are semantically related In some cases you can use "On-the-fence" instead an adjective phrase "Hush-hush".

Hush-hush and on-the-fence are semantically related in unwilling to decide topic. Sometimes you can use "Hush-hush" instead an adjective phrase "On-the-fence".