How Well Do You Know English Slang?
late 14c., "of the heart," from Middle French cordial, from Medieval Latin cordialis "of or for the heart," from Latin cor (genitive cordis) "heart" (see heart). Meaning "heartfelt, from the heart" is mid-15c. The noun is late 14c., originally "medicine, food, or drink that stimulates the heart." Related: Cordiality.
a liqueur (q.v.); though the term cordial was formerly used for only those liqueurs that were thought to have a tonic or stimulating quality due to the medicinal components of their flavourings, the terms cordial and liqueur are now used interchangeably.