creep up on someone
phrasal verb with creep verb [ I usually + adv/prep ] uk/kriːp/ us/kriːp/ crept | crept
不知不觉中体验到（某种情感或状态）
If a feeling or state creeps up on you, you start to experience it so gradually that you do not realize it.
It was only after I turned 60 that old age began to creep up on me. 上了60岁之后，我才感觉自己在不知不觉中已开始变老了。