Brewer's: Snuff

Up to snuff. Wide awake, knowing, sharp; not easily taken in or imposed upon; alive to scent (Dutch, snuffen, to scent, snuf; Danish, snöfte).

“You'll mar the light by taking it in snuff.”

Shakespeare: Love's Labour's Lost, v. 2.

“Who, ... when it next came there, took it in snuff.” —Shakespeare: 1 Henry IV., i. 3.

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