turned yellow, yellowed, chickened out, lost their nerve
O sangue amarelou.
He lost his nerve.
— Abril Despedaçado (2001)
Tom tinha planejado pedir aumento de salário ao chefe, mas amarelou.
Tom had planned to ask his boss for a raise, but he chickened out.
Amarelou.
It turned yellow.
Amarelou mesmo?
Did you really chicken out?
Tom amarelou.
Tom turned yellow.
Não acredito que você amarelou.
I can't believe you chickened out.
Amarelou, sim, senhor.
You chickened out, yes sir.