This is the 209th most frequent Czech word.
zranění
Injury.
In this sentence, 'zranění' refers to a physical injury or wound that someone has sustained.
Jeho zranění bylo velmi vážné.
His injury was very serious.
Here, 'zranění' is used in a general sense referring to the possibility of injuries occurring.
Musíme zabránit zranění během sportovních aktivit.
We must prevent injuries during sporting activities.
In this example, 'zranění' is contextually pointing to a specific injury mentioned in the narrative.