не смог удержаться от смеха

couldn't help laughing

→ не
phrase Rare #43,914
couldn't help laughing Literally, “was unable to hold back from laughter.” The form смог changes according to the subject’s gender and number, such as смогла for a feminine subject and смогли for plural subjects.
RU: Я не смог удержаться от смеха, когда увидел это видео.
EN: I couldn't help laughing when I saw this video.