This is the 15674th most frequent Turkish word.
telsiz
"Radio" or "walkie-talkie."
Here 'telsiz' is used to mean 'radio' as a communication device.
Bu telsiz ile şehir dışındaki ekibimizle haberleşiyoruz.
We communicate with our team outside the city using this radio.
In this sentence, 'telsiz' refers to the device used by firefighters for communication.
Yangın sırasında itfaiyeciler telsizle konuşuyorlardı.
During the fire, firefighters were talking via radio.
Here 'telsiz' refers to radios as collectible items, indicating the historical or hobbyist context of the devices.