Questions about example sentences with, and the definition and usage of "Disavow"

A: to refute, to reject knowledge of, to disown.

"Britain will disavow any knowledge of the spy if they are discovered."

"I disavow any attempt to act on my behalf"

A: Disavow - to deny, to make the vows null.
In that context it means the climate change response promises were no longer held by Trump.

Dismantle - To disassemble, to take apart.
In that context, it means to remove the regulations.

A: To speak against and be completely separate from the behaviors of fake/phony/false experts (usually medical doctors). Treat them like you would treat a disease.

A: She disavowed any involvement in the incident.

She disavowed any knowledge of the thefts.

I think this word is usually used most in legal contexts. I would just say she swore she was not involved or she swore she did not have any knowledge in the examples above.

A: They mean the same thing almost but disclaim is more often used, disavow is a very uncommon word.

A: deny means to say no to something/someone
disavow means to refuse to acknowledge something/someone

"He disavowed their hard work" - he refused to acknowledge
"He denied the offer" -another way to say no

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