deny

emphatically, fiercely, firmly, hotly, strenuously, strongly, vehemently, vigorously

The witness firmly denied ever seeing the suspect at the location that night.

categorically, flatly

She flatly denied that she had taken the money from the cash register.

simply

She simply denied knowing anything about the missing money.

consistently, repeatedly

She repeatedly denied taking the money from her roommate's wallet.

cannot

You cannot deny that her cooking skills have improved dramatically over the past year.

try to

He tried to deny responsibility for the broken window, but his muddy footprints told the truth.

no one could/would deny that

No one could deny that learning a new language takes a lot of time and effort.

there is no denying sth

There is no denying that she has become one of the best players on the team.

cruelly

She was cruelly denied the promotion despite working there for five years.

effectively

The new policy effectively denies low-income families access to healthcare services.

to

She denied access to the building after the security alarm went off.