sputter

Probably representing Middle English sputren, sputrien, a frequentative form of Middle English sputen (“to spout, vomit”), equivalent to spout + -er. Cognate with Saterland Frisian spüttern (“to inject, spray, splash”), West Frisian sputterje (“to sputter”), Dutch sputteren (“to sputter”), Low German sputtern, spruttern (“to sprinkle”), German sprudeln (“to spout, squirt”). Compare splutter.