This is the 12371st most frequent Spanish word.
lucir
To shine, to look, or to wear/display.
Here, 'lucir' is used in the sense of displaying or wearing an item in a way that highlights its attractiveness.
Ella sabe cómo lucir su vestido favorito.
She knows how to show off her favorite dress.
In this sentence, 'lucir' refers to the act of shining or emitting brightness.
El sol lucía brillando fuerte en el cielo.
The sun was shining brightly in the sky.
In this context, 'lucir' is used to describe appearing or seeming a certain way, conveying a personal attribute.