Definition of «to add some steel»

The phrase "to add some steel" means to give someone or something more strength, determination, or toughness.

But, now that I've tasted this pumpkin spice steel cut granola, I'm kicking myself for not adding steel cut oats to my granola before. (exsloth.com)
A solid DM would give us that added steel at the back we desperately need if we wish to be title contenders. (justarsenal.com)
Bring water, vanilla and apple cider to a rolling boil and add steel cut oats, salt and cinnamon then simmer on low for 20 minutes. (thelemonbowl.com)
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