他轻抚着孩子的头发，眼中流露出温柔的怜爱。

He stroked the child's hair with great ___tenderness in his eyes.

我刷牙时牙龈有压痛感。

I feel some ___tenderness in my gums when brushing my teeth.

炖了两个小时的牛肉非常软烂，入口即化。

The beef stewed for two hours had perfect ___tenderness, melting in the mouth.