Sumiso (en. Submissive)

/suˈmiso/

Slang Meanings

In the context of relationships, it refers to a person who allows themselves to be dominated.
She has always been a bit submissive in her romantic relationships.
Ella siempre ha sido un poco sumisa en sus relaciones amorosas.
It is used in a derogatory tone to refer to someone who lacks character.
Don't be so submissive, defend your ideas!
No seas tan sumiso, ¡defiende tus ideas!