To bawl is to weep or wail loudly. If you tend to bawl at sad movies, you might want to bring some tissues for wiping your tears and blowing your nose.
If a baby bawls all night, he doesn't just cry — he sobs and howls. You can also use the verb to talk about other loud sounds, like shouts: "He bawls out orders while we stand there, confused," or even amusement: "She bawls with laughter all through the woman's strange speech." In the 15th century, to bawl was to "bark like a dog," from the Old Norse baula, "to low or moo like a cow."