The little dog gets cuddlier on winter nights, always wanting to snuggle next to me.

cuddlier 是形容词 cuddly 的比较级形式。cuddly 由动词 cuddle（拥抱、依偎）加上形容词后缀 -ly 构成，意思是"可爱的、喜欢依偎的"。cuddlier 表示"更爱撒娇的、更想依偎的"。