This is the 5492nd most frequent Polish word.
towarzyszyła
"Towarzyszyła" means "she/it accompanied."
Here, 'towarzyszyła' is used in the sense of physically accompanying or going together with someone.
Do szkoły towarzyszyła mi młodsza siostra.
To school, my younger sister accompanied me.
In this context, 'towarzyszyła' conveys the idea of an emotion metaphorically accompanying someone.
Radość towarzyszyła jej podczas całej uroczystości.
Joy accompanied her throughout the entire ceremony.
Here, 'towarzyszyła' is used to describe a non-physical form of accompaniment, such as a thought or a melody staying with someone.