One must strike while the iron is hot.

Strike while the iron is hot.

The blacksmith engraved the owner's name on the sword's metal tag.

He is a fervent defender of human rights.

Fermium is a chemical element with the symbol Fm and atomic number 100.

Farmers must fertilize the fields at the beginning of spring to ensure a good harvest.

The valley is very fertile and produces a wide variety of fruits and vegetables.

The fermentation of grapes is a crucial step in the production of wine.

We took the ferry to cross the river.