Nuzzle (verb)

1. To push or rub the nose or face against something or someone, especially in a soft or affectionate way.
2. To move close to something or someone and touch or rub against them gently.

Origin:

From the middle english word "nusselen" meaning "to push or rub the nose against something". the word first appeared in english in the 14th century.

Examples:

1. The dog nuzzled his nose against her hand, asking for a treat.
2. The horse nuzzled her gently, as if trying to communicate something.
3. The baby nuzzled close to his mother for warmth and comfort.
4. The cat nuzzled her face, purring contentedly.
5. The lovers nuzzled each other affectionately, enjoying the warmth of the fire.