put an animal, a bird, etc. out of its misery to kill a creature because it has an illness or injury that cannot be treated
In the end we asked the vet to put the poor creature out of its misery.
So, I understand that an animal or even a person is physically suffering a lot and there is no way to cure them and they will die eventually. So, it's better to kill them now so that they will not suffer any more.
Say, a patient who has a serious illness and it is hurting him so much so the patient might say to his doctor "Please put me out of misery" which is another way of saying "Please kill me".
Say, you like Liverpool soccer team and Liverpool is playing against Manchester United now.
Now Manchester is winning 3-0 against Liverpool and Liverpool is losing. Mow Manchester scores another goal to be winning 4-0. The fourth goal assures the match that Manchester wins.
Can we say "The fourth goal put me out of misery" and "The fourth goal put Liverpool out of misery"?