dʰrebʰ-
“to drive, push, run”Source of English drive, drift, drove
Root for driving or pushing, producing Germanic *drīban and English drive, drift, drove.
Discussion
The Proto-Indo-European root *dʰrebʰ- meant "to drive, to push, to propel" and belongs to a group of roots describing forceful forward motion. The root produced a tight cluster of English words that retain the core sense of impelled movement, making it one of the more semantically coherent root families in the Germanic vocabulary.
In Germanic, the initial aspirated voiced stop *dʰ became *d (via the intermediate stage typical of Grimm's Law, where aspirated voiced stops lost their aspiration to become plain voiced stops). Old English drīfan "to drive, to push forward" is the direct ancestor of modern English drive. The word originally referred to any act of forcing forward — driving cattle, driving a nail, driving an enemy — and only later narrowed to its modern association with vehicles.
The related word drift descends from the same root, denoting the result of being driven: snow that has been driven by wind forms a drift, a boat carried by current is adrift, and the general drift of a conversation is the direction in which it is pushed. The word drove (a herd of animals being driven) is another derivative.
Outside Germanic, the root is less clearly attested, which has led some scholars to question its Proto-Indo-European pedigree and suggest it may be a Germanic innovation. However, possible cognates have been proposed in Slavic (Old Church Slavonic drobiti "to crush") and elsewhere, suggesting a broader distribution.
The semantic consistency of the *dʰrebʰ- family in English — drive, drift, drove, all retaining the sense of forced forward motion — contrasts with roots like *bʰleg- where meaning diverged sharply. This coherence may reflect the physical clarity of the underlying concept: pushing something forward is a universal and unambiguous action that resists metaphorical splitting.