lastimarían
Condicional para el sujetoellos/ellas/ustedesdel verbolastimar.

lastimar

Antes, habría apretado tan fuerte el volante que mis nudillos se lastimarían.
Before, I would grip the steering wheel so tight my knuckles would hurt.
Sabía que se lastimarían.
I knew someone would get hurt. Look at this.
Repetí incansablemente que no saltaran del árbol o se lastimarían, y no me hicieron caso.
I repeated tirelessly that you shouldn't jump from the tree or you'd hurt yourselves, and you didn't listen to me.
Palabra del día
permitirse