Break out就是指战争、打斗或者火灾等不愉快事件的发生,而这种发生通常都是突发的.
Fire broke out during the night.
夜间突然发生了火灾.
They had escaped to America shortly before war broke out in 1939.
1939 年战争爆发前不久他们逃到了美国.
Fighting had broken out between rival groups of fans.
双方球迷发生了打斗.
Engulf就是包围;吞没;淹没的意思,是及物动词
The vehicle was engulfed in flames. 汽车被大火吞没。
He was engulfed by a crowd of reporters. 他被一群记者团团围住。