This is the 15887th most frequent Turkish word.
tüneldeki
"In the tunnel."
Here, 'tüneldeki' specifies 'işçiler' (the workers) as being located in the tunnel.
Tüneldeki işçiler molozları temizliyor.
The workers in the tunnel are cleaning the rubble.
Here, 'tüneldeki' modifies 'lambaları' (the lamps), indicating their location is within the tunnel.
Biz tüneldeki lambaları değiştirdik.
We changed the lamps in the tunnel.
Here, 'tüneldeki' describes 'sessizlik' (silence), attributing it to the tunnel.