Simple past tense and past participle of froth.(verb)
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Use "frothed" in a sentence
"There were still others where the notion frothed and foamed, turning up unexpected ideas, revealing depths of dissatisfaction, of desire, of unsuspected powers in woman that startled the staid old world."
"I closed my eyes as the water frothed, the steady hum of the motor soothing my jangled nerves."
"You, on the other hand, adjure that my posts are "frothed with more like despair, and dissatisfaction", and are "almost void or lacking the bolstering of support her new found home town direly needs"."