verboten (adj.)

Old English forbeodan "forbid, prohibit" (past tense forbead, plural forbudon, past participle forboden), from for- "against" + beodan "to command" (from PIE root *bheudh- "be aware, make aware"). Common Germanic compound (compare Old Frisian forbiada, Dutch verbieden, Old High German farbiotan, German verbieten, Old Norse fyrirbjoða, Swedish förbjuda, Gothic faurbiudan "to forbid").

In Middle English the past tense was forbad, the plural forbade, the past participle forbode. Related: Forbade; forbidden. Expression God forbid is recorded by early 13c. Forbidden fruit is from Genesis ii.17.

Proto-Indo-European root meaning "be aware, make aware."

It forms all or part of: beadle; bid; bo tree; bode; Bodhisattva; Buddha; forbid; foreboding; ombudsman; verboten.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit bodhati "is awake, is watchful, observes," buddhah "awakened, enlightened;" Old Church Slavonic bljudǫ  "to observe;" Lithuanian budėti "to be awake;" Old Irish buide "contentment, thanks;" Old English bodian "proclaim, announce; foretell," boda "messenger."