刚强的英文：
firm
unyielding

参考例句：

Rigidity of manner or opinion
态度或意见之刚强

He is a man of cast-iron will.
他是一个意志刚强的人。

The soldiers are hard grit.
士兵们全都是刚强勇敢的。

Masculine vigor;potency.
刚强有力;男性性交能力

He is a man of cast-iron will.
他是一个意志刚强的人。

"Deeds are males, and words are females"
言柔弱无能,行刚强有力

Her courage and good humour saw her through the bad times.
她有志气、性格刚强,有助于她渡过难关.

loft was rigid and cold and military
洛夫特是刚强冷酷而又遵守军纪的。

If he be fearful and fainthearted, it will dishonour his god.
他若恐惧、不刚强，就羞辱了上帝。

These early Greeks of the "iliad" are sturdy fighters
《伊利亚特》里的早期希腊人是刚强的战士。

firm是什么意思：
n. 商号；企业
adj. 坚定的；坚固的；强有力的；确定的；坚挺的；严格的
v. （使）坚固；变坚实；加强；使坚定；回升
adv. 坚定地

Are the firm's finances sound?
这家公司的财务状况可靠吗?

His step was not as sharp and firm.
他的脚步不再像从前那样敏捷、坚实。

To become firm or gelatinous; congeal.
凝固凝结或变硬；冻结

To make or become firm.
使稳定，使变坚固

make firm or secure; strengthen.
使坚固或安全；强化。

unyielding是什么意思：
adj. 不屈的，坚强的；不易弯曲的

A pugnacious, unyielding, or determined person.
好斗者好斗的、不屈服的或有毅力的人

Unyielding in principle,purpose,or adherence;steadfast.
坚定不移的在原则、目的或坚持等方面不屈服的;不动摇的

This is not to say that our naming policy on such civil cases is unyielding.
这并不是说我们在此类民事案件上的公布姓名政策是不会让步的。

She was a fiery, brilliant and unyielding intellectual and politician.
她是个充满激情、才华卓越、毫不妥协的知识分子和政治家。

Having the bark so contracted and unyielding as to hinder growth.Used of trees.
树皮过于紧密而妨碍生长的。用于树