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1580s, from Dutch or Flemish snuffelen "to sniff about, pry," related to Dutch and Flemish snuffen "to sniff" (see snuff (v.2)). Related: Snuffled; snuffling.
1764, "sound made by snuffling," from snuffle (v.). Old English had snofl (n.) "phlegm, mucus." The snuffles "troublesome mucous discharge from the nostrils" is from 1770.
snuffle snuf·fle (snŭf'əl)
v. snuf·fled, snuf·fling, snuf·fles
To breathe noisily, as through a blocked nose. n.
The act of snuffling.
snuffles Obstructed nasal respiration, especially in a newborn, sometimes due to congenital syphilis.