'eustyle' originates from Greek, specifically the elements 'eu-' and 'stylos', where 'eu-' meant 'good' and 'stylos' meant 'column'.

'eustyle' was formed in modern English from Greek roots (via scholarly and architectural Latin/Greek traditions) and entered architectural usage to denote an ideal or recommended spacing of columns.

Initially, the roots signified 'good column' or 'good columnar form'; over time the compound became a technical architectural term for a particular, well-proportioned intercolumniation (about 2.25 diameters) and, by extension, any harmonious column arrangement.