forearm / ˈfɔːrɑːm / v. 前臂；前肢

=＋

His forearm was injured.

他的前臂受伤了。

forecast / ˈfɔːkɑːst / v. 预测

=＋

Rain is forecast for tomorrow.

预报明天有雨。

foredoom / ˈfɔːduːm / v. 事先注定

=＋

The plan is foredoomed to failure from the start. 这个计划从一开始就注定要失败。

forefather / ˈfɔːfɑːðə(r) / n. 祖先；前辈

=＋

My forefather lived in Beijing.

我的祖先生活在北京。

forehead / ˈfɔːhed / n. 额头

=＋

She had a wound on her forehead.

她的前额上有伤口。