suppressed laughter 抑制的笑声
giggle 咯咯笑
snort 哼笑
chuckle 轻笑
guffaw 大笑
1. I heard a snickering sound coming from behind the door.
我听到门后传来轻微的咯咯笑声。
2. The students were caught snickering during the serious lecture.
学生们在严肃的讲座中被发现偷偷窃笑。
3. Her snickering at his mistake made him feel even more embarrassed.
她对他错误的窃笑让他感到更加尴尬。
A: Why are you making that noise?
A：你为什么发出那种声音？
B: Sorry, I couldn't help snickering at the funny video.
B：抱歉，我忍不住对那个有趣的视频窃笑。
1) 偷偷的、压抑的轻笑
2) 带有幸灾乐祸意味的窃笑
3) 表示得意或嘲讽的咯咯声
1. 窃笑；咯咯笑（常指抑制的或带有嘲弄意味的笑）
e.g.
He gave a snicker and walked away.
他咯咯笑了一声然后走开了。
verb/noun
1. To laugh in a suppressed or giggling way, often because one finds something funny or feels smug/derisive.
Synonym: giggle, chuckle, snort