). Main modern sense of "to prohibit" is from O.N. cognate banna "curse, prohibit," and probably in part from O.Fr. ban, which meant "outlawry, banishment," among other things (see banal
) and was a borrowing from Germanic. The sense evolution in Germanic was from "speak" to "proclaim a threat" to (in O.N., Ger., etc.) "curse." The Germanic root, borrowed in Latin and French, has been productive: cf. banish
, etc. Banned in Boston dates from 1920s, in allusion to the excessive zeal and power of that city's Watch and Ward Society.
"governor of Croatia," from Serbo-Croat. ban "lord, master, ruler," from Pers. ban "prince, lord, chief, governor," related to Skt. pati "guards, protects." Hence banat "district governed by a ban," with Latinate suffix -atus. The Persian word got into Slavic perhaps via the Avars.
"edict of prohibition," from ban
(v.). O.E. (ge)bann meant "proclamation, summons, command."