This is the 1749th most frequent Turkish word.
tir
"Truck" or "lorry."
In this sentence, 'tır' refers to a large road freight vehicle (a semi-trailer truck).
Bu kamyon bir tırdır.
This truck is a tractor-trailer.
Here, 'dır' is a copula suffix in Turkish that connects the subject to the predicate, expressing existence or truth emphatically.
Sonunda anladım ki mutluluk içimizdedir.
Finally, I understood that happiness is within us.
In this instance, 'tır' is used to describe a specific type of freight transport vehicle.