This is the 557th most frequent Hebrew word.
מהירה
"מהירה" means "fast" or "quick" (feminine form).
The word 'מהירה' (meheera) describes the noun 'המכונית' (hamchonit - the car), denoting its quality of being swift or quick.
המכונית הזאת מהירה מאוד.
This car is very fast.
The adjective 'מהירה' (meheera) is used to describe 'המחשבה' (hamachshava - thinking), indicating the quality of rapidness or speed.
הצטיינותה בלימודים נובעת מחשיבתה המהירה.
Her excelling in studies stems from her fast thinking.
Here, 'מהירה' (meheera) serves as an adjective for 'התשובה' (hateshuva - the response), emphasizing its promptness.