答案不唯一：

① finder － 探测器；发现者。

② friend－ 朋友，友人；资助者；助手。

③ redfin－ 滩头雅罗（一种红鳍淡水鱼。

④ refind－ 重新查找。

相关介绍

The money was returned intact by its finder.

钱原封未动地被捡拾者送还。

They've been best friends since they were children.

他们从孩提时起就是最要好的朋友。