General Opposites:
* Be humble: This is the most direct opposite, emphasizing modesty and not drawing attention to oneself.
* Be discreet: This focuses on being subtle and avoiding excessive attention.
* Be self-effacing: This emphasizes downplaying one's achievements and abilities.
* Be unassuming: This implies being low-key and not trying to impress others.
Opposites Focused on Specific Aspects:
* Hide: If "show off" means to display something publicly, the opposite could be to keep it hidden or private.
* Underplay: If "show off" implies exaggerating one's abilities, the opposite would be to understate them.
* Be selfless: If "show off" involves seeking attention for oneself, the opposite could be to focus on others and their needs.
* Be understated: This emphasizes simplicity and avoiding ostentation.
Ultimately, the best opposite for "show off" depends on the specific situation and what you want to emphasize.