argon

The word comes from Ancient Greek ἀργός (argós), meaning 'idle' or 'lazy,' itself formed from a negative prefix plus ἔργον (érgon), 'work.' The ending '-on' was borrowed from 'carbon' and became the standard suffix for naming noble gases.

It began as a Greek description of laziness or inactivity, then was repurposed in the 19th century to name a newly discovered element known for refusing to react with anything else.

Its '-on' ending links it to 'carbon,' which supplied the suffix later used for naming all the noble gases, including argon itself.