Strong's #5612: oruomai (pronounced o-roo'-om-ahee)
middle voice of an apparently primary verb; to "roar":--roar.
Thayer's Greek Lexicon:
̓́
ōruomai
1) to roar, to howl (of a lion, wolf, dog, and other beasts)
1a) of men, to raise a loud and inarticulate cry: either of grief, or of joy
2) to sing with a loud voice
Part of Speech: verb
Relation: middle voice of an apparently primary verb
Usage:
This word is used 1 times:
1 Peter 5:8: "adversary the devil, as a roaring lion, walketh about, seeking whom"