munition

The story

1. French · borrowed frommunition
2. Latin · derived frommūnitiō“a defence, fortification”
3. English todaymunition

From Latin mūnitiō (“a defence, fortification”) via French munition, from mūnīre (“fortify, defend (with a wall)”) + -tiō, from moenia (“city walls, defensive walls, or walls in general”). Equivalent to munite + -ion.