wèi / le / shuō / fú / tā / wǒ / mó / pò / kǒu / shé / tā / hái / shì / bù / kěn / gǎi / biàn / zhǔ / yì

为了说服他，我磨破口舌，他还是不肯改变主意。

I wore out my tongue trying to persuade him, but he still refused to change his mind.