The story
- Proto-Indo-European*h₁én
- Proto-Italic*en
- Proto-Italic*en-
- Latinin-
- Proto-Indo-European*per-?
- Proto-Indo-European*pres-
- Proto-Italic*pres-
- Latinpremō
- Latinimprimō
- Latinimpressiōnem
- Frenchimpression
- Frenchimpressionner
- Frenchimpressionnable
- English todayimpressionable
From French impressionnable, equivalent to impression + -able. See also impressible.
Etymology from Wiktionary, CC BY-SA 4.0.