noun
servile character; slave mentality
A strongly negative term for a person's ingrained submissive or servile attitude, as if they were a slave. Often used in criticism of someone who lacks independence or self-respect.
彼は上司に何を言われても反論しない。まるで奴隷根性だ。
He never talks back to his boss no matter what. It's like he has a slave mentality.
奴隷根性が染みついていると、自由な発想は生まれない。
If you're ingrained with a servile character, you can't come up with free ideas.