Just stumbled upon one lol (no idea whether it's actually good linguistics tho. Might be entirely made-up and still slaps)

The word “duty” is derived from the word “due.” “Due” traces its origins back to the old French deu. Both source and derivation share the same meaning: that which is owed. A duty isn’t a responsibility to be fulfilled, it is a debt that must be repaid. If a boss tries feeding you a less etymologically accurate version of this bullshit, tell them to go pound sand. The only debt accrued on the job is the debt your boss owes you.

Source