cannot
Definitions
To be unable to; lack the power, skill, or means to do something.
To be prohibited from; not allowed to.
To be logically impossible or inconsistent with the facts.
Examples
I cannot believe how fast the time has passed.
You cannot enter the building without a valid security badge.
We cannot ignore the environmental impact of our daily choices.
Synonyms
unable incapable powerless incompetent helpless unfit disqualified