一、堅韌的英文是：

tough and tensile、firm and tenacious

二、短語搭配：

堅韌不拔firm and indomitable; persistent and dauntless; staunch and unyielding

質地堅韌be tensile

三、例句：

1、他的作品證明了他內心的堅韌。

His writings witness to an inner toughness.

2、堅韌不拔的史密斯堅持了整整八輪（比賽）。

The durable Smith lasted the full eight rounds.

3、坐在被告席上聽候審判可使最堅韌的心失去勇氣。

Sitting in the dock awaiting a sentence will unman the stoutest heart.