submissive
Willing to let others decide and not stand up for yourself.
When someone is submissive, they readily give in to others' wishes or authority, often without questioning or resisting. A submissive person tends to go along with what others want rather than asserting their own preferences or opinions.
You might see this in group projects when one student always accepts everyone else's ideas without ever suggesting their own, even when they have good thoughts to contribute. Or imagine a friend who always lets others pick the movie, choose the restaurant, or decide the game, never speaking up about what they'd prefer.
Being submissive is different from being cooperative or compromising. Cooperation means working together, where everyone contributes ideas and sometimes yields to reach the best solution. Being submissive means consistently putting yourself last and rarely standing up for your own views or needs.
The word often describes behavior in relationships where one person has authority over another. A submissive dog, for instance, rolls over and shows its belly to demonstrate it accepts another dog's dominance. In human relationships, constantly submissive behavior can become problematic because healthy relationships involve mutual respect, where both people feel free to express themselves.
Sometimes circumstances call for being submissive to legitimate authority, like following a lifeguard's instructions at the pool. But generally, finding balance matters: knowing when to cooperate, when to defer to others' expertise, and when to confidently express your own thoughts and needs.