dynamic
/daɪˈnæmɪk/·다이내믹·adjective
characterized by constant change or motion; energetic
GreekCEFR B2
Root
Greek 'dynamis' (power, force)
Greek dynamis (power) → dynamikos (powerful) → French dynamique (Leibniz, 17th c., as a term of physics) → English dynamic (19th c.)
In a word
Greek dynamis = 'power'. Leibniz revived the word in the 17th century to name 'the force of motion'. The dyna family branches from 'power' — dynamic (where force is in motion), dynamics (the science of motion), dynamo (generator), dynamite (explosive), dynasty (power inherited). A physics class's "dynamics" and a casual "dynamic person" both stand on the single Greek word Leibniz pulled into the modern era.
Examples
She is a dynamic leader.
The market is highly dynamic.
Dynamic systems change over time.
Related
dynamicsdynamismdynamodynamitedynasty