The word 'than' originates from the Old English 'þonne', which served as both an adverb meaning 'then' and a conjunction used for comparison. It is cognate with Dutch 'dan' and German 'denn'. This development illustrates a common linguistic process where a word indicating time or sequence ('then') evolves into a marker for comparative relationships. Its form was influenced by the comparative suffix '-an', leading to the specialized conjunction we use today to distinguish between items in a comparison.

This word is a simplex form. It is a grammatical particle derived from Old English.