This is the 11989th most frequent Turkish word.
giyerken
"While wearing" or "as wearing."
The word 'giyerken' is used as a transitional phrase indicating the action of 'wearing clothes' is occurring simultaneously with an emphasis on carefulness.
Kıyafetlerini giyerken çok dikkatli olması gerektiğini söyledi.
He said that she should be very careful while putting on her clothes.
Here, 'giyerken' connects the action of 'putting on clothes' to other simultaneous actions of helping and commenting.
Giyerken arkadaşlarına yardım etti ve onlara ne kadar güzel göründüklerini söyledi.
While putting on clothes, she helped her friends and told them how great they looked.
In this sentence, 'giyerken' indicates that the action of 'wearing the dress' is in process while another observation is made.