The antonyms for the word "more free-spirited" can be described as restrained, conformist, and inhibited. A restrained person is someone who is hesitant to express themselves and tends to hold back their emotions or ideas. A conformist is someone who adheres strictly to societal norms and rules, and isn't willing to deviate from them. An inhibited person is someone who is hindered or limited by their own fears or self-doubt, which leads them to avoid taking risks or expressing their true selves. Overall, these antonyms for being "more free-spirited" represent individuals who lack the courage or confidence to live their lives openly and authentically.