1. 
[syn: forbidden, out(p), prohibited, proscribed, taboo, tabu, verboten]
WordNet (r) 3.0 (2006):
verboten
    adj 1: excluded from use or mention; "forbidden fruit"; "in our
           house dancing and playing cards were out"; "a taboo
           subject" [syn: forbidden, out(p), prohibited,
           proscribed, taboo, tabu, verboten]
Moby Thesaurus II by Grady Ward, 1.0:
27 Moby Thesaurus words for "verboten":
   banned, barred, contraband, disapproved, forbade, forbid,
   forbidden, illegal, illicit, nonpermissible, not permitted,
   off limits, out of bounds, outlawed, prohibited, ruled out, taboo,
   tabooed, unallowed, unauthorized, under the ban, unlawful,
   unlicensed, unpermissible, unsanctioned, untouchable, vetoed