roar

n. 1 a loud deep hoarse sound, as made by a lion. B similar sound. 2 loud laugh. v. 1 (often foll. By out) utter loudly or make a roar, roaring laugh, etc. 2 travel in a vehicle at high speed, esp. With the engine roaring. [old english]

v. i. To cry with a full, loud, continued sound.