source: 오늘의유머 - 토오사카 린... 무서운 여자였군요;

keep from (or keep someone from)

avoid (or cause someone to avoid) doing something:

A〈人〉がB〈事〉をするのを妨げる(stop), A〈人〉にBさせないようにする.

e.g. Dinah bit her lips to keep from screaming

e.g. he could hardly keep himself from laughing.