苦头的英文：
1.the bitter taste

参考例句：

Alas, for the effects of bad tea and bad temper!
哎哟，喝了坏茶，发了坏脾气，这会儿就吃苦头啦！

If you act rashly, you'll suffer for it.
蛮干是要吃苦头的。

He deserves not the sweet that will not taste the sour
吃过苦头,才配享受

China suffered greatly from the ten-year disaster, the ``cultural revolution''.
“文化大革命”十年浩劫，中国吃了苦头。

He might have been seriously injured if it had not been for bert
要不是伯特，他可要大吃苦头了。

He has suffered several times because he is credulous.
他太轻信，吃了好几次苦头。

He suffered much from a morBid acuteness of the senses
他由于异常的神经过敏而吃了不少苦头

I've just found it out the hard way.
我是吃了苦头才发现这点的。

Lazy folks take the most pains. ——John Ray
偷懒的人吃最大的苦头。——雷

You shall smart for this.
我得叫你为这吃吃苦头。

bitter是什么意思：
adj. 苦涩的，有苦味的；难以接受的；憎恶的；严寒的
n. 辛酸，苦味，苦酒

The medicine is as bitter as gall.
这药像胆汁一样苦。

They have been racked by bitter quarrels.
激烈的争吵使他们不得安生。

The discussion deteriorated into a bitter quarrel.
这场讨论演变成了激烈的争吵。

The leaves taste rather bitter.
这些叶子味道相当苦。

This medicine tastes very bitter.
这药苦极了。

taste是什么意思：
n. 味道；味觉；爱好；判断力，鉴赏力
v. 尝出，品出；尝味道；体验

There is on accounting for tastes
人各有所好

The tiger has once tasted Blood is never sated with the taste of it
老虎一次尝到血,它的贪心就更大

If you have a bad cold you cannot taste.
如果患了重感冒，就尝不出味道。

Everyone to his taste
百货中百客

She was tasting of the sweets of concealment.
她正在品尝隐瞒事实的乐趣。