This is the 12284th most frequent Portuguese word.
sacrificar
To sacrifice.
In this context, 'sacrificar' is used metaphorically to denote willingly giving up something of personal value (free time) for a purpose (finishing the project).
Ele decidiu sacrificar seu tempo livre para terminar o projeto.
He decided to sacrifice his free time to finish the project.
Here, 'sacrificar' refers to the noble act of giving one's life, typically in a figurative or literal sense for a greater cause.
A história do livro fala de um herói disposto a sacrificar sua vida pelo bem do povo.
The book's story talks about a hero willing to sacrifice his life for the good of the people.
In this case, 'sacrificar' is used in a direct way to indicate the act of ending the life of the animals, generally under difficult circumstances.