marvellous

The word 'marvellous' originates from the Old French term merveillos, meaning "wondrous" or "miraculous." This, in turn, derives from the Latin verb mirari, "to wonder at," which is connected to the Proto-Indo-European root smei-, meaning "to laugh or smile," hinting at the positive astonishment the word conveys. The core morpheme 'marvel' entered English as a noun for an astonishing object or event, and the adjectival suffix '-ous' (from Latin -osus, "full of") was appended to describe something full of that quality. Thus, the literal construction "full of wonder" evolved seamlessly into its modern meaning of something extraordinarily good or impressive.

Structure: marvel (wonder) + ous (adjective suffix) - marvel: From Old French merveille (a wonder, miracle), from Latin mirabilia (wonderful things), from mirari (to wonder at). - ous: A suffix forming adjectives, from Latin -osus (full of, prone to).