followed with ‘I wasn’t aware is so important to you. I didn’t want to insult you and if you felt so, I apologize. The word fuck is one I use very often, but I’ll try to control myself around you’
Note I didn’t insult the coworker (no fuck you or fuck off), but simply said ‘fuck’ out loud due to a job error.
Don’t go could turkey, you’ll fail. Lizard brain is gonna respond with or without monkey brains help.
As much as you can, start with replacing fuck with frack or fine or fudge, or just make it funny. Stopping the cadence is harder than changing the word.