steel
noun
an alloy of iron with small amounts of carbon; widely used in construction; mechanical properties can be varied over a wide range
a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard
knife sharpener consisting of a ridged steel rod
verb
get ready for something difficult or unpleasant
Synonymsnervecover, plate, or edge with steel
Source: WordNet 3.1, Princeton University