postimpressionistpostimpressionist

Postimpressionist comes from French impressionniste ‘impressionist (painter)’, and goes back to Latin premō ‘to press, push, press close or hard, oppress,…’.

1. Latinc. 75 BCE–200 CEpremō¹‘to press, push, press close or hard, oppress, overwhelm’
2. Latinc. 75 BCE–200 CEimprimō¹‘to press, impress’
3. Latinc. 75 BCE–200 CEimpressiōnem¹
4. Frenchc. 1600–presentimpression¹‘an impression, the overall effect of something’
5. Frenchc. 1600–presentimpressionniste¹‘impressionist (painter)’
6. English1500–presentimpressionist¹
7. Englishearliest quotation 2003postimpressionist¹

1. ¹ Wiktionary, English postimpressionist
2. Earliest quotation in Wiktionary’s entry: 2003, John H. Lienhard, Inventing Modern: Growing up with X-Rays: “The postimpressionists went much further in augmenting the limited…”.

Earlier history uncertain. See Wiktionary.