This is the 11274th most frequent Turkish word.
düşürücü
"Reducer" or "something that lowers or decreases."
Here 'düşürücü' is used as an adjective describing 'etkisi', specifying its effect of reducing fever.
Bu ilacın ateş düşürücü etkisi çok güçlüdür.
The fever-reducing effect of this medicine is very strong.
In this example, 'düşürücü' modifies 'sistemi', highlighting its function to reduce the speed of the car as an active system.
Arabanın hız düşürücü sistemi devreye girdi.
The car's speed-reducing system was activated.
This sentence uses 'düşürücü' as an adjective for 'teknikler', referring to techniques aimed at reducing stress.