ban (v.)youdaoicibaDictYouDict[ban 词源字典]
Old English bannan "to summon, command, proclaim," from Proto-Germanic *bannan "proclaim, command, forbid" (cognates: Old High German bannan "to command or forbid under threat of punishment," German bannen "banish, expel, curse"), originally "to speak publicly," from PIE root *bha- (2) "to speak" (cognates: Old Irish bann "law," Armenian ban "word;" see fame (n.)).

Main modern sense of "to prohibit" (late 14c.) is from Old Norse cognate banna "to curse, prohibit," and probably in part from Old French 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 Norse, German, etc.) "curse."

The Germanic root, borrowed in Latin and French, has been productive: banish, bandit, contraband, etc. Related: Banned; banning. Banned in Boston dates from 1920s, in allusion to the excessive zeal and power of that city's Watch and Ward Society.[ban etymology, ban origin, 英语词源]
gobbledygook (n.)youdaoicibaDictYouDict
also gobbledegook, "the overinvolved, pompous talk of officialdom" [Klein], 1944, American English, first used by U.S. Rep. Maury Maverick, D.-Texas, (1895-1954), a grandson of the original maverick and chairman of U.S. Smaller War Plants Corporation during World War II, in a memo dated March 30, 1944, banning "gobbledygook language" and mock-threateaning, "anyone using the words activation or implementation will be shot." Maverick said he made up the word in imitation of turkey noise. Another word for it, coined about the same time, was bafflegab (1952).
maypole (n.)youdaoicibaDictYouDict
"high striped pole decorated with flowers and ribbons for May Day merrymakers to dance around," attested from 1550s but certainly much older, as the first mention of it is in an ordinance banning them, and there are references to such erections, though not by this name, from a mid-14c. Welsh poem. See May Day.
niggardly (adj.)youdaoicibaDictYouDict
1560s, from niggard + -ly (1).
It was while giving a speech in Washington, to a very international audience, about the British theft of the Elgin marbles from the Parthenon. I described the attitude of the current British authorities as "niggardly." Nobody said anything, but I privately resolved -- having felt the word hanging in the air a bit -- to say "parsimonious" from then on. [Christopher Hitchens, "The Pernicious Effects of Banning Words," Slate.com, Dec. 4, 2006]
As an adverb from 1520s. Related: Niggardliness.