The word "darling" is a term of endearment used to express affection towards someone you care deeply about. It can be used to refer to a loved one, such as a partner, child, or close friend, and conveys warmth and fondness.
The word "darling" comes from the Old English word "deorling," which is a diminutive of "deor," meaning "dear." The word has evolved over time and has been used in English literature since the 14th century to denote someone who is cherished or beloved.