This is the 5787th most frequent Japanese word.
ぬくもり
Warmth; emotional or physical warmth.
This sentence uses "ぬくもり" to refer to the physical warmth passed between people through touch.
手をつなぐと、相手のぬくもりが感じられる。
By holding hands, you can feel the warmth of the other person.
Here, "ぬくもり" metaphorically represents emotional warmth and comfort that family interactions provide.
家族とのひとときは心のぬくもりを与えてくれる。
Moments with family provide warmth to the heart.
In this usage, "ぬくもり" is applied to the physical warmth provided by a blanket.