She couldn't help but snigger quietly at the joke.
snigger uncontrollably
Frequency:
60
%
The comedian's jokes made the audience snigger uncontrollably.
snigger nervously
Frequency:
50
%
She sniggered nervously when asked a difficult question.
snigger behind
Frequency:
45
%
He was caught sniggering behind his friend's back.
Idiomatic Expressions for snigger
Phrase: suppress a snigger
Meaning: to try to hold back a laugh, especially when it is inappropriate or disrespectful
Usage: He had to suppress a snigger during the serious meeting to avoid offending his boss.