painful

形容词 painful:

1. causing physical or psychological pain
2. causing misery or pain or distress
   同义词：afflictive, sore
3. exceptionally bad or displeasing
   同义词：atrocious, abominable, awful, dreadful, terrible, unspeakable
4. causing physical discomfort
   同义词：irritating

1. Teaching him Greek was a painful (ie slow and difficult) process.
   教他希腊文是很吃力的事。
2. The sting of a jellyfish is very painful.
   让水母刺著是很痛的。
3. Extension of the injured arm was painful.
   把受伤的胳膊伸展开是很疼的。
4. He gained the medal through his painful travail.
   他通过艰辛的努力获得了奖牌。
5. An extremely unpleasant or painful condition or place.
   逆境极其不舒服或痛苦的境地或地方
6. The child's death left a painful void in his parents' lives.
   孩子的死给父母的生活留下了痛苦的空白。
7. The operation was very painful.
   手术很痛。
8. It was painful to admit that I was wrong.
   要我承认错了，是很费力的。

pain.ful

adj.（形容词）
Causing pain.
引起疼痛的
Full of pain.
充满痛苦的
Requiring care and labor; irksome:
需要费心费力的；使人讨厌的：
例句：
a painful task.
费力的工作

Archaic Diligent; careful.
【古语】 孜孜不倦的；勤勉的

【引伸】
pain.fully
adv.（副词）
pain.fulness
n.（名词）