This is the 11990th most frequent Turkish word.
giyerse
"If he/she/it wears."
Here, 'giyerse' metaphorically describes the action of using an umbrella as protection.
Eğer yağmur yağarsa ve o şemsiyesini giyerse, ıslanmaz.
If it rains and he uses his umbrella (wears it overhead), he won't get wet.
Here, 'giyerse' is used in a conditional clause, indicating a potential action (wearing) and its outcome.
Eğer o kırmızı ceketini giyerse, çok güzel görünecek.
If she wears her red jacket, she will look very beautiful.
In this sentence, 'giyerse' refers to a choice of dressing (wearing sports shoes) and its practical benefits.