(verb) writhe toss / (verb) wallow / (verb) to rise and fall or toss about in or with waves / (verb) to become deeply sunk, soaked, or involved / (verb) to be in turmoil / (noun) a state of wild disorder; turmoil / (noun) a chaotic mass or jumble
the Communist Party USA emerged, in 1919, out of a welter of dense socialist struggles