“严禁”的英语可以翻译为：strictly forbid [prohabit] ...

队长把“严禁吸烟”的标志牌都翻了过来。The captain turned out the "no smoking" signs.严禁酒后驾车a clampdown on drinking and driving博物馆内严禁摄影。Photography is strictly forbidden in the museum....

“严禁”的拼音为：yán jìn...