conscience
//ˈkɒn.ʃəns//
Noun
conscienceSingular
consciencesPlural
1
The inner sense of what is right or wrong in one's conduct or motives, impelling one toward right action.
My conscience wouldn't let me keep the money I found.
2
The complex of ethical and moral principles that controls or inhibits the actions or thoughts of an individual.
My conscience wouldn't let me lie to her.
3
A feeling of guilt or anxiety caused by doing something wrong or immoral.
She was troubled by a guilty conscience after lying to her friend.