hoary

老人的胡须因年岁而变得灰白。

The old man's beard was ___hoary with age.

这本古老的书籍记载了几个世纪前的故事。

This ___hoary book records stories from centuries ago.

老橡树的树皮呈现出灰白色，显得格外沧桑。

The ___hoary bark of the ancient oak tree looked weathered and wise.