This is the 3167th most frequent Turkish word.
düşer
"Düşer" means "falls" in English.
Here, 'düşer' indicates a decrease or lowering, explaining the temperature is dropping.
Eğer kar yağarsa, sıcaklık düşer.
If it snows, the temperature drops.
In this sentence, 'düşer' refers to a potential action of falling, implying a loss of balance.
Merdivenlerden dikkat et, yoksa düşer.
Be careful on the stairs, or you might fall.
Here, 'düşer' suggests a metaphorical decline, referring to a decrease in esteem or status.