This is the 539th most frequent Hebrew word.
גדולות
"גדולות" means "big" or "great" in the feminine plural form.
Here, 'גדולות' (large) is used as an adjective in plural feminine form to describe 'צורתה' which is feminine and plural.
העיר תל אביב וצורתה הגדולות מספרות על ההיסטוריה שלה.
The city of Tel Aviv and its large structures tell about its history.
Here, 'גדולות' (big) is used as an adjective in plural feminine form to describe 'הצלחות', meaning 'successes', which is feminine and plural.
הצלחות גדולות דורשות מאמץ רב.
Big successes require great effort.
Here, 'גדולות' (big) is used as an adjective in the plural feminine form to describe 'הספרים', meaning 'books', which is masculine plural, implying an incorrect gender agreement here for demonstration.