sneaking
adjective [ before noun ] uk/ˈsniː.kɪŋ/ us/ˈsniː.kɪŋ/
（感觉）暗自的，隐隐感到的
If you have a sneaking feeling about someone or something, you have that feeling, although you are not certain it is correct.
I have a sneaking feeling/suspicion that we're going the wrong way. 我隐隐觉得／暗自有点怀疑我们走错了路。