'Tabu', also spelled 'taboo' works here...
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swearing, cursing
turn
wits
act
Yep, an act.
do
The "f word" is a four-letter word, originally meaning a sex act, but used in many ways, including swearing or cursing. (for spelling or origin see related questions)
Sin.
act
act
act
"Deed" could refer to legal entitlement to property (in government) or an act by a citizen (in citizenship). However, it is more likely you are asking about the five-letter word "civic."