guilt

be consumed with, be haunted by, be overwhelmed with, be racked with, feel, suffer

She was haunted by guilt after forgetting her mother's birthday for the second year.

assuage

He volunteered at the animal shelter to assuage his guilt about not visiting his elderly mother.

sear sb, sweep over sb, wash over sb

A wave of guilt washed over him when he realized he had forgotten his mother's birthday.

~ about/at/over

She felt guilty about missing her friend's birthday party.

a burden of guilt

She finally talked to a therapist about the burden of guilt she had felt for years.

establish, prove

The detective worked hard to establish the suspect's guilt before the trial.

lie

The responsibility for the accident ultimately lies with the driver who ignored the warning signs.

an admission of guilt

The suspect's lawyer advised against any admission of guilt before the trial.