Heart-to-heart and Unrelieved

Heart-to-heart adjective - Openly straightforward and direct without reserve or secretiveness.

Unrelieved and heart-to-heart are semantically related. In some cases you can use "Unrelieved" instead an adjective phrase "Heart-to-heart".

Unrelieved adjective - Not lessened or diminished.

Heart-to-heart and unrelieved are semantically related. Sometimes you can use "Heart-to-heart" instead an adjective "Unrelieved".