sneaky

1.I developed a sneaky fondness for the old lady.

我暗中对这位老太太产生。

2.But Wakefield used his trademark knuckleball to set up a sneaky fastball, ducking and weaving the New York bats in tight spots.

但伟克飞尔用他蝴蝶球搭配著诡异直球，屡次在紧要关头解决洋基打者。