The phrase "under one's thumb" is often used to describe a person who is completely controlled or influenced by another individual. Antonyms for this phrase would include terms that suggest independence, freedom, and autonomy. Such words could include "self-determining," "self-governing," "self-reliant," "independent," "in charge," "assertive," and "empowered." These antonyms reflect the opposite of being entirely submissive or subservient to someone else's will and imply the ability to be one's own person and make decisions based on personal desires and beliefs. Anyone who is under someone's thumb should aim to become free and self-reliant, taking control of their own lives and destiny.
