The word "wholehearted" is a transparent English compound formed from native Germanic elements. The first element, "whole," derives from the Old English concept of being sound, unhurt, and entire, which evolved to signify completeness. The second element, "heart," has long been the metaphorical seat of emotion, courage, and intention in English, stemming from its Proto-Germanic root. The compound, emerging in the 19th century, logically combines these ideas to describe an action or feeling that engages one's complete and undivided emotional commitment, as if involving the entirety of one's heart. It contrasts with "half-hearted," illustrating how bodily metaphors for emotional states are deeply embedded in the language.

Structure: whole (entire) + heart (center of feeling) + ed (adjective suffix) - whole: From Old English hāl (sound, healthy, entire). In this compound, it functions as an intensifier meaning "complete" or "entire". - heart: From Old English heorte (the organ; the seat of emotion, mind, spirit). In this compound, it metaphorically represents the core of one's feelings or sincerity. - ed: A common English suffix forming adjectives from nouns, meaning "having the qualities of" or "characterized by".