"Conscientious" means "characterized by or acting on a sense of moral responsibility." It's formed by adding the suffix "-ous" to "conscience," which refers to a person's inner sense of what is right and wrong.
"Conscientious" means "characterized by or acting on a sense of moral responsibility." It's formed by adding the suffix "-ous" to "conscience," which refers to a person's inner sense of what is right and wrong.