Old English drifan "to compel or urge to move, impel in some direction or manner; to hunt (deer), pursue; to rush against" (class I strong verb; past tense draf, past participle drifen), from Proto-Germanic *dreibanan (source also of Old Frisian driva"I lead, impel, drive (away)," Old Saxon driban, Dutch drijven, Old High German triban, German treiben, Old Norse drifa, Gothic dreiban "to drive"), perhaps from PIE root *dhreibh- "to drive, push," but it may be a Germanic isolated word.
Used in Old English of nails, ships, plows, vehicles, cattle; in Middle English of bargains. Meaning "compel or incite to action or condition of any kind" (drive mad) is by late 12c. Sense of "work with energy, labor actively" is c. 1200; that of "aim a blow" is by early 14c.. Transitive meaning "convey (someone) in a carriage," later an automobile, is from 1660s. The original sense of "pushing from behind" was altered in Modern English by application to automobiles. Related: Driving.
MILLER: "The more you drive, the less intelligent you are." ["Repo Man," 1984]
late 14c., metathesis of Old English þurh, from Proto-Germanic *thurx (source also of Old Saxon thuru, Old Frisian thruch, Middle Dutch dore, Dutch door, Old High German thuruh, German durch, Gothic þairh "through"), from PIE root *tere- (2) "to cross over, pass through, overcome." Not clearly differentiated from thorough until early Modern English. Spelling thro was common 15c.-18c. Reformed spelling thru (1839) is mainly American English.