tincture

(noun) a substances that colors metals.

(noun) an indication that something has been present. Synonyms: trace, vestige, shadow. Examples: "There wasn't a trace of evidence for the claim." "A tincture of condescension."

(noun) a quality of a given color that differs slightly from another color. Synonyms: shade, tint, tone. Example: "After several trials he mixed the shade of pink that she wanted."

(noun) (pharmacology) a medicine consisting of an extract in an alcohol solution.

(verb) fill, as with a certain quality. Synonyms: impregnate, infuse, instill. Example: "The heavy traffic tinctures the air with carbon monoxide."

(verb) stain or tint with a color. Example: "The leaves were tinctured with a bright red."