gnaw at (someone's) conscience

Translations
грызть (чью-то) совесть
The guilt began to gnaw at his conscience.
Вина начала грызть его совесть.
Definitions
To cause someone to feel persistent guilt or remorse about something they have done or failed to do.
Words
gnaw

verb
грызть
at

preposition
на
someone

pronoun
кого то
is

functional word
есть
conscience

noun
совесть