bitters

(noun) alcoholic liquor flavored with bitter herbs and roots.

(noun) English term for a dry sharp-tasting ale with strong flavor of hops (usually on draft). Synonyms: bitter.

(noun) the taste experience when quinine or coffee is taken into the mouth. Synonyms: bitter, bitterness.

(noun) the property of having a harsh unpleasant taste. Synonyms: bitterness, bitter.

(verb) make bitter. Synonyms: bitter.