IPA: /ˈfɛr.i.əs/
KK: /ˈfɛrɪəs/
Describing something that contains or looks like iron.
The ferreous material was used in the construction of the bridge.
Ferreous is derived from "ferrum" (meaning iron) and the suffix "-eous" (meaning possessing the qualities of). The word refers to something that possesses the qualities of iron or is related to iron.
Think of 'ferrum' which means iron, and remember that 'ferreous' describes something that has the qualities of iron.