Ujjvalanilamani 10.38

10.38

atha mardavam--
mārdavaṃ komalasyāpi saṃsparśāsahatocyate |
uttamaṃ madhyamaṃ proktaṃ kaniṣṭhaṃ ceti tat tridhā //

Now, tenderness (mārdava):
Tenderness is called the inability to endure the touch of even something soft.
It is said to be threefold: superior, middling, and inferior.