was injured; hurt himself
Se hirió el brazo levantando tanto peso.
He injured his arm lifting so much weight.
Tom se hirió la rodilla cuando se cayó.
Tom hurt his knee when he fell.
Desde que se hirió en un accidente, no ha podido volver a andar.
Since being injured in an accident, he has not been able to walk again.
Él se hirió en el partido de ayer.
He was injured in yesterday's game.
En realidad, él se hirió solo.
Actually, he hurt himself.