= process by which turbulent waters produce a loud and intimidating noise
roaring, seething
Speak
= process by which humans produce loud sounds, either as individuals or groups, in order to give expression to aggression, revelry, or excessive pride
noise, tumult
Groups
literally: noise, tumult; hence: = a group of people in the process of making loud noise
noisy crowd, tumultuous throng
Unsafe
literally: roaring; hence: = process by which a political entity, like a nation or kingdom, is in a state of unrest, often meaning that they are contemplating rebellion or planning to wage war; described in terms of the sound produced by turbulent waters