韧性
rèn xìng
toughness
leather (韦) + blade (刃) = tough resilience (韧) + inner nature (性)
Leather (韦) that bends under a blade (刃) without breaking captures the physical idea of toughness. Add the heart radical (忄) and 生, and toughness becomes an inner quality of character — the kind that is lived, not just endured.
这种材料的韧性很强，不容易断裂。
zhè zhǒng cái liào de rèn xìng hěn qiáng, bù róng yì duàn liè。
this type of material has very strong toughness and does not break easily.
经历了很多困难之后，他展现出极强的韧性。
jīng lì le hěn duō kùn nan zhī hòu, tā zhǎn xiàn chū jí qiáng de rèn xìng。
after going through many difficulties, he showed extremely strong toughness.