Borrowed from German in WWI — the exact cognate of English 'forbidden,' but with authoritarian connotations.
Forbidden, especially by an authority; prohibited.
From German 'verboten,' the past participle of 'verbieten' (to forbid), from Old High German 'farbiotan,' from Proto-Germanic *farbeuðaną (to forbid), a compound of the prefix *far- (completely, intensely) and *beuðaną (to command, to offer). English adopted it during World War I, often used mockingly or sarcastically to evoke German authoritarianism and rigid rule-following. The word is the exact cognate of English 'forbidden' — both from the same Proto-Germanic root — but 'verboten' carries a specifically Germanic, authoritarian connotation that 'forbidden'
English 'forbidden' and German 'verboten' are exact cognates: English 'for-' = German 'ver-' (both from Proto-Germanic *far-), English 'bid' = German 'biet-' (both from *beuðaną, to command), English '-den' = German '-en' (both past participle endings). They are the same word that evolved in parallel for over a thousand years — yet English borrowed 'verboten' back because it carries a flavor of stern, humorless authority that 'forbidden' does not.