What is the act of snuffing; a sound made by the air passing through the nose when obstructed. This dread sovereign, Breath, in its passage, gave a snort or snuffle. Coleridge called?

snuffle — The act of snuffing; a sound made by the air passing through the nose when obstructed. This dread sovereign, Breath, in its passage, gave a snort or snuffle. Coleridge. (Webster's 1913.)