to touch, rub, or press something or someone gently and/or in a way that shows your love, especially with the head or nose, usually with small repeated movements

My dog came and nuzzled my foot to try and cheer me up. 我的狗过来用鼻子蹭我的脚，想让我高兴起来。

The kittens like to nuzzle up against/up to their mother. 小猫喜欢仅仅挨着它们的妈妈。