Use these alternatives in formal or diplomatic settings.
Rude word
Polite/formal alternative
When to use
fuck
use strong / emphatic language; "utterly unacceptable"
When you need forceful condemnation without profanity
bastard
"a person acting dishonourably" / "an unscrupulous individual"
To criticise behaviour while keeping tone professional
shut up
"please allow me to finish" / "may I respond"
During interruptions or heated debates
idiot / fool
"misguided" / "poorly informed"
When correcting mistakes without personal attack
asshole
"inconsiderate" / "demonstrating poor judgement"
When calling out behaviour professionally
jerk
"uncooperative" / "acting disrespectfully"
When describing conduct rather than attacking the person