This is the 12971st most frequent Russian word.
лишившей
"Лишившей" means "having deprived" or "having lost" depending on context.
Here, 'лишившей' describes the writer who performed the action of depriving the public.
Она была известной писательницей, лишившей публику возможности расстаться с её книгами.
She was a famous writer who deprived the public of the opportunity to part with her books.
In this context, 'лишившая' refers to the painting and describes the effect it had on the viewers.
Картина, лишившая зрителей дара речи, занимала центральное место на выставке.
The painting, which left viewers speechless, occupied the central place at the exhibition.
Here, 'лишившая' describes the music and its influence upon the situation or experience.