The story
- Proto-Indo-European*ḱe?
- Proto-Indo-European*ḱóm
- Proto-Italic*kom
- Proto-Italic*kom-
- Proto-Italic*komteros
- Proto-Italic*komterād
- Latincontrā
- Englishcontra-
- Proto-Indo-European*per-der.?
- Proto-Indo-European*pér
- Proto-Indo-European*pró
- Proto-Indo-European*pro-
- Proto-Italic*pro-
- Latinprō-
- Proto-Indo-European*dewk-
- Proto-Indo-European*déwkti
- Proto-Italic*doukō
- Latindūcō
- Latinprōdūcō
- Late Latinprōductīvus
- Englishproductive
- English todaycontraproductive
From contra- + productive. Spontaneously calqued from the users' respective native language, e.g. German kontraproduktiv, Romanian contraproductiv.
Etymology from Wiktionary, CC BY-SA 4.0.