English

geoengineer

From geo- + engineer.

Proto-Hellenic *gaya

Ancient Greek γῆ ‘earth’

English geo-

Proto-Indo-European *ǵenh₁- ‘to produce’

…

Old French engin ‘contraption, device; ingenuity’

Old French engigneor ‘engineer, designer’

Anglo-Norman enginour

Middle English enginour ‘military engineer; machine designer’

Today it means

noun An engineer whose speciality is geoengineering (geological engineering).

Language periods are conventional ranges, not dates for this word.

Etymograph / geoengineer