What does "at all" mean?

Indicating degree, quantity or frequency greater than zero: to the slightest degree, in any way, at any time or in any circumstance.

What is a synonym for "at all"?

Common synonyms include: anyhow, anyway, anywise, at any cost, at any rate, by any chance.

/[æˈɾɔɫ]/ adv

adv ·Rare ·Advanced level

Adverb

1
Indicating degree, quantity or frequency greater than zero: to the slightest degree, in any way, at any time or in any circumstance. idiomatic, not-comparable
"You mustn't speak to her at all."

Adverb

"You mustn't speak to her at all."