diadem

The word 'diadem' originates from the Greek 'diadēma', which itself is derived from the verb 'diadein', meaning "to bind around". This verb is a compound of 'dia-' ("across, through") and 'dein' ("to bind"). The original object was a white headband, often tied at the back, worn by Eastern monarchs as a symbol of authority. The semantic logic evolved from the literal action of "binding across" the head to signify the one who binds or rules over the people. Over time, especially through Latin 'diadema', the meaning specialized to denote a jeweled crown or band representing sovereign power, moving from a simple cloth binding to a regal ornament.

Structure: dia (across) + dem (people) dia- (Greek origin, preposition meaning "through, across, thoroughly"); -dem (from Greek 'dēmos', meaning "people, common people").