Avoid any reference to his illness.是什么意思？

Avoid any reference to his illness.

千万别提起他的病。

avoid

vt. 避开，避免，预防，[法]使无效，撤销，废止；

例句
I've known clients of mine go to absurd lengths, just to avoid paying me a few pounds...
我知道我的一些客户就为了少付我几英镑，可谓无所不用其极。

any

adj. 任何的，一点，一些，普通的，任何，随便哪一个；pron. 任何，无论哪个，若干；adv. 稍微，少许，什么，一些，一点；

例句
The authorities have abandoned any attempt to distribute food...
当局中止了分发食物的尝试。

reference

n. 参考，参考书，提及，涉及，证明人，介绍人；v. 引用，参照；

例句
...a colour coding that will ensure easy reference for potential users.
确保潜在用户查阅方便的颜色编码

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

illness

n. 疾病，某种具体疾病，不健康；

例句
Although his mental illness had coincided with his war service it had not been caused by it...
虽然他的精神病刚好在他参战期间发作，但并不是由此引起的。