vi.

1. 偷偷地走，溜[Q]
   I didn't notice Tom sneaking up behind me.

   我没有注意汤姆从我后面偷偷走了上来。

2. 偷偷地躲避；狡猾地逃避
3. 【英】【俚】向老师打小报告[（+on）]

vt.

1. 【口】偷窃，偷偷取得
   The boy sneaked all the candies he could.

   男孩把他能偷到的糖果全偷走了。

2. 偷偷地做，偷偷地吃
   He sneaked a watch into his pocket.

   他偷偷地将一只表塞进口袋。

n.[C]

1. 偷偷摸摸的人，鬼鬼祟祟的人
2. 【英】【俚】告密者
3. 溜走，不告而别
   Why did he take a sneak?

   他为什么溜之大吉？

4. 偷偷摸摸的勾当

v.

1. move, go, or convey in a furtive or stealthy manner.
   ▸stealthily do or obtain:

   she sneaked a glance at her watch.
2. Brit. informal inform someone in authority of a person's misdeeds.

n.

1. Brit. a telltale.
2. a furtive person.
3. N. Amer. short for sneaker.

adj.