Simple past tense and past participle of splutter.(verb)
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Use "spluttered" in a sentence
"While on overall appearance Zack scored an easy eight, Abby soon found him overbearing — a high-strung junior land agent who spluttered when he spoke."
"But then the flames drowned out the rest, and Raspa was engulfed in flames that stretched up and spluttered sparks like shooting stars into the velvety black, strangely beautiful night sky."
"I spluttered, making a “zip it” motion with my hands."