What does "cost something one's life" in this context mean?
Actually,I have already read the meaning and the example in Longman dictionary,but I don't understand this phrase in this context,
( It's about hyena)
"He (hyena) once witnessed a brutal attacked.This young male(hyena) tried to join the clan.The female's rejection almost cost the outsider his life."
What does "cost the outsider his life" in this context mean?
Thank you very much